2023 National Bank Open – Men's singles

{{Infobox tennis tournament event|2023|National Bank Open|

| champ = {{flagicon|ITA}} Jannik Sinner

| runner = {{flagicon|AUS}} Alex de Minaur

| score = 6–4, 6–1

| draw = 56

| seeds = 16

| main_name = Canadian Open (tennis) {{!}} Canadian Open

}}

Jannik Sinner defeated Alex de Minaur in the final, 6–4, 6–1 to win the men's singles title at the 2023 Canadian Open. It was his first ATP Tour Masters 1000 title and eighth ATP Tour singles title overall.{{Cite web |date=13 August 2023 |title=Sinner's Time! Italian Earns First Masters 1000 Crown In Toronto|url=https://www.atptour.com/en/news/de-minaur-sinner-toronto-2023-sunday-final |website=atptour.com}}

Pablo Carreño Busta was the reigning champion,{{Cite web |date=14 August 2022 |title=Carreno Busta Battles Back For First Masters 1000 Crown |url=https://www.atptour.com/en/news/hurkacz-carreno-busta-montreal-2022-final |url-status=live |archive-url=https://web.archive.org/web/20230530225036/https://www.atptour.com/en/news/hurkacz-carreno-busta-montreal-2022-final |archive-date=30 May 2023 |access-date=17 July 2023 |publisher=Association of Tennis Professionals}} but withdrew before the tournament began due to injury.{{Cite news |date=1 August 2023 |title=Defending champion Carreno Busta out of ATP Toronto Masters |work=France24 |agency=Agence France-Presse |url=https://www.france24.com/en/live-news/20230801-defending-champion-carreno-busta-out-of-atp-toronto-masters |access-date=5 August 2023}}

Seeds

The top eight seeds received a bye into the second round.

{{columns-list|colwidth=30em|

{{seeds|1|1}}{{flagicon|ESP}} Carlos Alcaraz (quarterfinals)

{{seeds|2|4}}{{flagicon|}} Daniil Medvedev (quarterfinals)

{{seeds|3|3}}{{flagicon|NOR}} Casper Ruud (third round)

{{seeds|4|2}}{{flagicon|GRE}} Stefanos Tsitsipas (second round)

{{seeds|5|1}}{{flagicon|DEN}} Holger Rune (second round)

{{seeds|6|3}}{{flagicon|}} Andrey Rublev (second round)

{{seeds|7|2}}{{flagicon|ITA}} Jannik Sinner (champion)

{{seeds|8|4}}{{flagicon|USA}} Taylor Fritz (third round)

{{seeds|9|3}}{{flagicon|USA}} Frances Tiafoe (first round)

{{seeds|10|2}}{{flagicon|CAN}} Félix Auger-Aliassime (first round)

{{seeds|11|4}}{{flagicon|GBR}} Cameron Norrie (first round)

{{seeds|12|1}}{{flagicon|USA}} Tommy Paul (semifinals)

{{seeds|13|3}}{{flagicon|GER}} Alexander Zverev (second round)

{{seeds|14|2}}{{flagicon|CRO}} Borna Ćorić (first round)

{{seeds|15|1}}{{flagicon|POL}} Hubert Hurkacz (third round)

{{seeds|16|4}}{{flagicon|ITA}} Lorenzo Musetti (third round)

}}

Draw

=Finals=

{{8TeamBracket-Tennis3-v2

|RD1=Quarterfinals

|RD2=Semifinals

|RD3=Final

|team-width=175

|RD1-seed1=1

|RD1-team1={{flagicon|ESP}} Carlos Alcaraz

|RD1-score1-1=3

|RD1-score1-2=6

|RD1-score1-3=3

|RD1-seed2=12

|RD1-team2={{flagicon|USA}} Tommy Paul

|RD1-score2-1=6

|RD1-score2-2=4

|RD1-score2-3=6

|RD1-seed3=PR

|RD1-team3={{flagicon|FRA}} Gaël Monfils

|RD1-score3-1=4

|RD1-score3-2=6

|RD1-score3-3=3

|RD1-seed4=7

|RD1-team4={{flagicon|ITA}} Jannik Sinner

|RD1-score4-1=6

|RD1-score4-2=4

|RD1-score4-3=6

|RD1-seed5=

|RD1-team5={{flagicon|USA}} Mackenzie McDonald

|RD1-score5-1=4

|RD1-score5-2=2

|RD1-score5-3=

|RD1-seed6=

|RD1-team6={{flagicon|ESP}} Alejandro Davidovich Fokina

|RD1-score6-1=6

|RD1-score6-2=6

|RD1-score6-3=

|RD1-seed7=

|RD1-team7={{flagicon|AUS}} Alex de Minaur

|RD1-score7-1=7⁹

|RD1-score7-2=7

|RD1-score7-3=

|RD1-seed8=2

|RD1-team8={{flagicon|}} Daniil Medvedev

|RD1-score8-1=6⁷

|RD1-score8-2=5

|RD1-score8-3=

|RD2-seed1=12

|RD2-team1={{flagicon|USA}} Tommy Paul

|RD2-score1-1=4

|RD2-score1-2=4

|RD2-score1-3=

|RD2-seed2=7

|RD2-team2={{flagicon|ITA}} Jannik Sinner

|RD2-score2-1=6

|RD2-score2-2=6

|RD2-score2-3=

|RD2-seed3=

|RD2-team3={{flagicon|ESP}} Alejandro Davidovich Fokina

|RD2-score3-1=1

|RD2-score3-2=3

|RD2-score3-3=

|RD2-seed4=

|RD2-team4={{flagicon|AUS}} Alex de Minaur

|RD2-score4-1=6

|RD2-score4-2=6

|RD2-score4-3=

|RD3-seed1=7

|RD3-team1={{flagicon|ITA}} Jannik Sinner

|RD3-score1-1=6

|RD3-score1-2=6

|RD3-score1-3=

|RD3-seed2=

|RD3-team2={{flagicon|AUS}} Alex de Minaur

|RD3-score2-1=4

|RD3-score2-2=1

|RD3-score2-3=

}}

=Top half=

==Section 1==

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Third round

| RD4=Quarterfinals

| RD1-seed03=

| RD1-team03={{flagicon|USA}} B Shelton

| RD1-score03-1=7⁷

| RD1-score03-2=6

| RD1-score03-3=

| RD1-seed04=

| RD1-team04={{flagicon|ESP}} B Zapata Miralles

| RD1-score04-1=6¹

| RD1-score04-2=4

| RD1-score04-3=

| RD1-seed05=Q

| RD1-team05={{flagicon|CHI}} C Garín

| RD1-score05-1=6²

| RD1-score05-2=6

| RD1-score05-3=4

| RD1-seed06=

| RD1-team06={{flagicon|SRB}} M Kecmanović

| RD1-score06-1=7⁷

| RD1-score06-2=4

| RD1-score06-3=6

| RD1-seed07=

| RD1-team07={{flagicon|KAZ}} A Bublik

| RD1-score07-1=3

| RD1-score07-2=6²

| RD1-score07-3=

| RD1-seed08=15

| RD1-team08={{flagicon|POL}} H Hurkacz

| RD1-score08-1=6

| RD1-score08-2=7⁷

| RD1-score08-3=

| RD1-seed09=12

| RD1-team09={{flagicon|USA}} T Paul

| RD1-score09-1=6

| RD1-score09-2=3

| RD1-score09-3=6

| RD1-seed10=Q

| RD1-team10={{flagicon|ARG}} D Schwartzman

| RD1-score10-1=3

| RD1-score10-2=6

| RD1-score10-3=4

| RD1-seed11=WC

| RD1-team11={{flagicon|CAN}} A Galarneau

| RD1-score11-1=2

| RD1-score11-2=6

| RD1-score11-3=4

| RD1-seed12=

| RD1-team12={{flagicon|ARG}} F Cerúndolo

| RD1-score12-1=6

| RD1-score12-2=4

| RD1-score12-3=6

| RD1-seed13=

| RD1-team13={{flagicon|FIN}} E Ruusuvuori

| RD1-score13-1=6⁴

| RD1-score13-2=6⁶

| RD1-score13-3=

| RD1-seed14=Q

| RD1-team14={{flagicon|USA}} M Giron

| RD1-score14-1=7⁷

| RD1-score14-2=7⁸

| RD1-score14-3=

| RD2-seed01=1

| RD2-team01={{flagicon|ESP}} C Alcaraz

| RD2-score01-1=6

| RD2-score01-2=7⁷

| RD2-score01-3=

| RD2-seed02=

| RD2-team02={{flagicon|USA}} B Shelton

| RD2-score02-1=3

| RD2-score02-2=6³

| RD2-score02-3=

| RD2-seed03=

| RD2-team03={{flagicon|SRB}} M Kecmanović

| RD2-score03-1=7

| RD2-score03-2=3

| RD2-score03-3=0

| RD2-seed04=15

| RD2-team04={{flagicon|POL}} H Hurkacz

| RD2-score04-1=5

| RD2-score04-2=6

| RD2-score04-3=6

| RD2-seed05=12

| RD2-team05={{flagicon|USA}} T Paul

| RD2-score05-1=7⁷

| RD2-score05-2=6²

| RD2-score05-3=6

| RD2-seed06=

| RD2-team06={{flagicon|ARG}} F Cerúndolo

| RD2-score06-1=6²

| RD2-score06-2=7⁷

| RD2-score06-3=3

| RD2-seed07=Q

| RD2-team07={{flagicon|USA}} M Giron

| RD2-score07-1=6

| RD2-score07-2=4

| RD2-score07-3=6

| RD2-seed08=5

| RD2-team08={{flagicon|DEN}} H Rune

| RD2-score08-1=2

| RD2-score08-2=6

| RD2-score08-3=3

| RD3-seed01=1

| RD3-team01={{flagicon|ESP}} C Alcaraz

| RD3-score01-1=3

| RD3-score01-2=7⁷

| RD3-score01-3=7⁷

| RD3-seed02=15

| RD3-team02={{flagicon|POL}} H Hurkacz

| RD3-score02-1=6

| RD3-score02-2=6²

| RD3-score02-3=6³

| RD3-seed03=12

| RD3-team03={{flagicon|USA}} T Paul

| RD3-score03-1=6

| RD3-score03-2=6

| RD3-score03-3=

| RD3-seed04=Q

| RD3-team04={{flagicon|USA}} M Giron

| RD3-score04-1=3

| RD3-score04-2=2

| RD3-score04-3=

| RD4-seed01=1

| RD4-team01={{flagicon|ESP}} C Alcaraz

| RD4-score01-1=3

| RD4-score01-2=6

| RD4-score01-3=3

| RD4-seed02=12

| RD4-team02={{flagicon|USA}} T Paul

| RD4-score02-1=6

| RD4-score02-2=4

| RD4-score02-3=6

}}

==Section 2==

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Third round

| RD4=Quarterfinals

| RD1-seed03=PR

| RD1-team03={{flagicon|FRA}} G Monfils

| RD1-score03-1=7⁷

| RD1-score03-2=6⁴

| RD1-score03-3=6

| RD1-seed04=

| RD1-team04={{flagicon|USA}} C Eubanks

| RD1-score04-1=6³

| RD1-score04-2=7⁷

| RD1-score04-3=1

| RD1-seed05=

| RD1-team05={{flagicon|ARG}} TM Etcheverry

| RD1-score05-1=3

| RD1-score05-2=2

| RD1-score05-3=

| RD1-seed06=

| RD1-team06={{flagicon|USA}} S Korda

| RD1-score06-1=6

| RD1-score06-2=6

| RD1-score06-3=

| RD1-seed07=LL

| RD1-team07={{flagicon|AUS}} A Vukic

| RD1-score07-1=6

| RD1-score07-2=6

| RD1-score07-3=

| RD1-seed08=14

| RD1-team08={{flagicon|CRO}} B Ćorić

| RD1-score08-1=2

| RD1-score08-2=3

| RD1-score08-3=

| RD1-seed09=10

| RD1-team09={{flagicon|CAN}} F Auger-Aliassime

| RD1-score09-1=4

| RD1-score09-2=4

| RD1-score09-3=

| RD1-seed10=Q

| RD1-team10={{flagicon|AUS}} M Purcell

| RD1-score10-1=6

| RD1-score10-2=6

| RD1-score10-3=

| RD1-seed11=

| RD1-team11={{flagicon|ITA}} L Sonego

| RD1-score11-1=6³

| RD1-score11-2=0

| RD1-score11-3=

| RD1-seed12=

| RD1-team12={{flagicon|GBR}} A Murray

| RD1-score12-1=7⁷

| RD1-score12-2=6

| RD1-score12-3=

| RD1-seed13=

| RD1-team13={{flagicon|FRA}} G Barrère

| RD1-score13-1=4

| RD1-score13-2=3

| RD1-score13-3=

| RD1-seed14=

| RD1-team14={{flagicon|ITA}} M Berrettini

| RD1-score14-1=6

| RD1-score14-2=6

| RD1-score14-3=

| RD2-seed01=4

| RD2-team01={{flagicon|GRE}} S Tsitsipas

| RD2-score01-1=4

| RD2-score01-2=3

| RD2-score01-3=

| RD2-seed02=PR

| RD2-team02={{flagicon|FRA}} G Monfils

| RD2-score02-1=6

| RD2-score02-2=6

| RD2-score02-3=

| RD2-seed03=

| RD2-team03={{flagicon|USA}} S Korda

| RD2-score03-1=3

| RD2-score03-2=6

| RD2-score03-3=6⁵

| RD2-seed04=LL

| RD2-team04={{flagicon|AUS}} A Vukic

| RD2-score04-1=6

| RD2-score04-2=4

| RD2-score04-3=7⁷

| RD2-seed05=Q

| RD2-team05={{flagicon|AUS}} M Purcell

| RD2-score05-1=6²

| RD2-score05-2=6

| RD2-score05-3=5

| RD2-seed06=

| RD2-team06={{flagicon|GBR}} A Murray

| RD2-score06-1=7⁷

| RD2-score06-2=3

| RD2-score06-3=7

| RD2-seed07=

| RD2-team07={{flagicon|ITA}} M Berrettini

| RD2-score07-1=4

| RD2-score07-2=3

| RD2-score07-3=

| RD2-seed08=7

| RD2-team08={{flagicon|ITA}} J Sinner

| RD2-score08-1=6

| RD2-score08-2=6

| RD2-score08-3=

| RD3-seed01=PR

| RD3-team01={{flagicon|FRA}} G Monfils

| RD3-score01-1=6

| RD3-score01-2=6

| RD3-score01-3=

| RD3-seed02=LL

| RD3-team02={{flagicon|AUS}} A Vukic

| RD3-score02-1=4

| RD3-score02-2=4

| RD3-score02-3=

| RD3-seed03=

| RD3-team03={{flagicon|GBR}} A Murray

| RD3-score03-1=

| RD3-score03-2=

| RD3-score03-3=

| RD3-seed04=7

| RD3-team04={{flagicon|ITA}} J Sinner

| RD3-score04-1=w/o

| RD3-score04-2=

| RD3-score04-3=

| RD4-seed01=PR

| RD4-team01={{flagicon|FRA}} G Monfils

| RD4-score01-1=4

| RD4-score01-2=6

| RD4-score01-3=3

| RD4-seed02=7

| RD4-team02={{flagicon|ITA}} J Sinner

| RD4-score02-1=6

| RD4-score02-2=4

| RD4-score02-3=6

}}

=Bottom half=

==Section 3==

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Third round

| RD4=Quarterfinals

| RD1-seed03=

| RD1-team03={{flagicon|USA}} M McDonald

| RD1-score03-1=6

| RD1-score03-2=6

| RD1-score03-3=

| RD1-seed04=

| RD1-team04={{flagicon|}} A Karatsev

| RD1-score04-1=3

| RD1-score04-2=4

| RD1-score04-3=

| RD1-seed05=

| RD1-team05={{flagicon|FRA}} A Mannarino

| RD1-score05-1=6⁵

| RD1-score05-2=4

| RD1-score05-3=

| RD1-seed06=Q

| RD1-team06={{flagicon|JPN}} T Daniel

| RD1-score06-1=7⁷

| RD1-score06-2=6

| RD1-score06-3=

| RD1-seed07=WC

| RD1-team07={{flagicon|CAN}} M Raonic

| RD1-score07-1=6¹²

| RD1-score07-2=7⁷

| RD1-score07-3=6

| RD1-seed08=9

| RD1-team08={{flagicon|USA}} F Tiafoe

| RD1-score08-1=7¹⁴

| RD1-score08-2=6⁴

| RD1-score08-3=3

| RD1-seed09=13

| RD1-team09={{flagicon|GER}} A Zverev

| RD1-score09-1=6

| RD1-score09-2=7⁷

| RD1-score09-3=

| RD1-seed10=

| RD1-team10={{flagicon|NED}} T Griekspoor

| RD1-score10-1=4

| RD1-score10-2=6³

| RD1-score10-3=

| RD1-seed11=

| RD1-team11={{flagicon|ESP}} A Davidovich Fokina

| RD1-score11-1=6

| RD1-score11-2=6

| RD1-score11-3=

| RD1-seed12=

| RD1-team12={{flagicon|USA}} JJ Wolf

| RD1-score12-1=0

| RD1-score12-2=2

| RD1-score12-3=

| RD1-seed13=

| RD1-team13={{flagicon|USA}} B Nakashima

| RD1-score13-1=5

| RD1-score13-2=6

| RD1-score13-3=6²

| RD1-seed14=

| RD1-team14={{flagicon|CZE}} J Lehečka

| RD1-score14-1=7

| RD1-score14-2=3

| RD1-score14-3=7⁷

| RD2-seed01=6

| RD2-team01={{flagicon|}} A Rublev

| RD2-score01-1=4

| RD2-score01-2=3

| RD2-score01-3=

| RD2-seed02=

| RD2-team02={{flagicon|USA}} M McDonald

| RD2-score02-1=6

| RD2-score02-2=6

| RD2-score02-3=

| RD2-seed03=Q

| RD2-team03={{flagicon|JPN}} T Daniel

| RD2-score03-1=4

| RD2-score03-2=3

| RD2-score03-3=

| RD2-seed04=WC

| RD2-team04={{flagicon|CAN}} M Raonic

| RD2-score04-1=6

| RD2-score04-2=6

| RD2-score04-3=

| RD2-seed05=13

| RD2-team05={{flagicon|GER}} A Zverev

| RD2-score05-1=1

| RD2-score05-2=2

| RD2-score05-3=

| RD2-seed06=

| RD2-team06={{flagicon|ESP}} A Davidovich Fokina

| RD2-score06-1=6

| RD2-score06-2=6

| RD2-score06-3=

| RD2-seed07=

| RD2-team07={{flagicon|CZE}} J Lehečka

| RD2-score07-1=6⁶

| RD2-score07-2=4

| RD2-score07-3=

| RD2-seed08=3

| RD2-team08={{flagicon|NOR}} C Ruud

| RD2-score08-1=7⁸

| RD2-score08-2=6

| RD2-score08-3=

| RD3-seed01=

| RD3-team01={{flagicon|USA}} M McDonald

| RD3-score01-1=6

| RD3-score01-2=6

| RD3-score01-3=

| RD3-seed02=WC

| RD3-team02={{flagicon|CAN}} M Raonic

| RD3-score02-1=3

| RD3-score02-2=3

| RD3-score02-3=

| RD3-seed03=

| RD3-team03={{flagicon|ESP}} A Davidovich Fokina

| RD3-score03-1=7⁷

| RD3-score03-2=4

| RD3-score03-3=7⁷

| RD3-seed04=3

| RD3-team04={{flagicon|NOR}} C Ruud

| RD3-score04-1=6⁴

| RD3-score04-2=6

| RD3-score04-3=6⁴

| RD4-seed01=

| RD4-team01={{flagicon|USA}} M McDonald

| RD4-score01-1=4

| RD4-score01-2=2

| RD4-score01-3=

| RD4-seed02=

| RD4-team02={{flagicon|ESP}} A Davidovich Fokina

| RD4-score02-1=6

| RD4-score02-2=6

| RD4-score02-3=

}}

==Section 4==

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Third round

| RD4=Quarterfinals

| RD1-seed03=

| RD1-team03={{flagicon|FRA}} U Humbert

| RD1-score03-1=4

| RD1-score03-2=6

| RD1-score03-3=6

| RD1-seed04=

| RD1-team04={{flagicon|CHI}} N Jarry

| RD1-score04-1=6

| RD1-score04-2=3

| RD1-score04-3=4

| RD1-seed05=WC

| RD1-team05={{flagicon|CAN}} G Diallo

| RD1-score05-1=7⁷

| RD1-score05-2=7

| RD1-score05-3=

| RD1-seed06=

| RD1-team06={{flagicon|GBR}} D Evans

| RD1-score06-1=6⁴

| RD1-score06-2=5

| RD1-score06-3=

| RD1-seed07=

| RD1-team07={{flagicon|AUS}} A de Minaur

| RD1-score07-1=7

| RD1-score07-2=6

| RD1-score07-3=

| RD1-seed08=11

| RD1-team08={{flagicon|GBR}} C Norrie

| RD1-score08-1=5

| RD1-score08-2=4

| RD1-score08-3=

| RD1-seed09=16

| RD1-team09={{flagicon|ITA}} L Musetti

| RD1-score09-1=6

| RD1-score09-2=6

| RD1-score09-3=

| RD1-seed10=

| RD1-team10={{flagicon|JPN}} Y Nishioka

| RD1-score10-1=4

| RD1-score10-2=1

| RD1-score10-3=

| RD1-seed11=

| RD1-team11={{flagicon|CHN}} Z Zhang

| RD1-score11-1=5

| RD1-score11-2=4

| RD1-score11-3=

| RD1-seed12=Q

| RD1-team12={{flagicon|AUS}} T Kokkinakis

| RD1-score12-1=7

| RD1-score12-2=6

| RD1-score12-3=

| RD1-seed13=WC

| RD1-team13={{flagicon|CAN}} V Pospisil

| RD1-score13-1=4

| RD1-score13-2=4

| RD1-score13-3=

| RD1-seed14=Q

| RD1-team14={{flagicon|ITA}} M Arnaldi

| RD1-score14-1=6

| RD1-score14-2=6

| RD1-score14-3=

| RD2-seed01=8

| RD2-team01={{flagicon|USA}} T Fritz

| RD2-score01-1=7⁹

| RD2-score01-2=3

| RD2-score01-3=6

| RD2-seed02=

| RD2-team02={{flagicon|FRA}} U Humbert

| RD2-score02-1=6⁷

| RD2-score02-2=6

| RD2-score02-3=3

| RD2-seed03=WC

| RD2-team03={{flagicon|CAN}} G Diallo

| RD2-score03-1=4

| RD2-score03-2=5

| RD2-score03-3=

| RD2-seed04=

| RD2-team04={{flagicon|AUS}} A de Minaur

| RD2-score04-1=6

| RD2-score04-2=7

| RD2-score04-3=

| RD2-seed05=16

| RD2-team05={{flagicon|ITA}} L Musetti

| RD2-score05-1=4

| RD2-score05-2=7

| RD2-score05-3=6

| RD2-seed06=Q

| RD2-team06={{flagicon|AUS}} T Kokkinakis

| RD2-score06-1=6

| RD2-score06-2=5

| RD2-score06-3=4

| RD2-seed07=Q

| RD2-team07={{flagicon|ITA}} M Arnaldi

| RD2-score07-1=2

| RD2-score07-2=5

| RD2-score07-3=

| RD2-seed08=2

| RD2-team08={{flagicon|}} D Medvedev

| RD2-score08-1=6

| RD2-score08-2=7

| RD2-score08-3=

| RD3-seed01=8

| RD3-team01={{flagicon|USA}} T Fritz

| RD3-score01-1=6⁷

| RD3-score01-2=6

| RD3-score01-3=1

| RD3-seed02=

| RD3-team02={{flagicon|AUS}} A de Minaur

| RD3-score02-1=7⁹

| RD3-score02-2=4

| RD3-score02-3=6

| RD3-seed03=16

| RD3-team03={{flagicon|ITA}} L Musetti

| RD3-score03-1=4

| RD3-score03-2=4

| RD3-score03-3=

| RD3-seed04=2

| RD3-team04={{flagicon|}} D Medvedev

| RD3-score04-1=6

| RD3-score04-2=6

| RD3-score04-3=

| RD4-seed01=

| RD4-team01={{flagicon|AUS}} A de Minaur

| RD4-score01-1=7⁹

| RD4-score01-2=7

| RD4-score01-3=

| RD4-seed02=2

| RD4-team02={{flagicon|}} D Medvedev

| RD4-score02-1=6⁷

| RD4-score02-2=5

| RD4-score02-3=

}}

Seeded players

The following are the seeded players. Seedings are based on ATP rankings as of 31 July 2023. Rank and points before are as of 7 August 2023.

class="wikitable sortable"

! style="width:30px;" |Seed

! style="width:30px;" |Rank

! style="width:185px;"|Player

! style="width:75px;" |Points before

! style="width:110px;"|Points defending

! style="width:75px;" |Points won

! style="width:75px;" |Points after

! style="width:350px;"|Status

style="text-align:center;" | 1

| style="text-align:center;" | 1

| {{flagicon|ESP}} Carlos Alcaraz

| style="text-align:center;" | 9,225

| style="text-align:center;" | 10

| style="text-align:center;" | 180

| style="text-align:center;" | 9,395

| Quarterfinals lost to {{flagicon|USA}} Tommy Paul [12]

style="text-align:center;" | 2

| style="text-align:center;" | 3

| {{flagicon

} Daniil Medvedev

| style="text-align:center;" | 6,360

| style="text-align:center;" | 10

| style="text-align:center;" | 180

| style="text-align:center;" | 6,530

| Quarterfinals lost to {{flagicon|AUS}} Alex de Minaur

| style="text-align:center;" | 3

| style="text-align:center;" | 5

| {{flagicon|NOR}} Casper Ruud

| style="text-align:center;" | 4,985

| style="text-align:center;" | 360

| style="text-align:center;" | 90

| style="text-align:center;" | 4,715

| {{nowrap|Third round lost to {{flagicon|ESP}} Alejandro Davidovich Fokina}}

| style="text-align:center;" | 4

| {{flagicon|GRE}} Stefanos Tsitsipas

| style="text-align:center;" | 5,090

| style="text-align:center;" | 10

| style="text-align:center;" | 5,090

| Second round lost to {{flagicon|FRA}} Gaël Monfils [PR]

| style="text-align:center;" | 5

| style="text-align:center;" | 6

| {{flagicon|DEN}} Holger Rune

| style="text-align:center;" | 4,825

| style="text-align:center;" | 45

| style="text-align:center;" | 10

| style="text-align:center;" | 4,790

| Second round lost to {{flagicon|USA}} Marcos Giron [Q]

| style="text-align:center;" | 6

| style="text-align:center;" | 7

| {{flagicon|}} Andrey Rublev

| style="text-align:center;" | 4,595

| style="text-align:center;" | 10

| style="text-align:center;" | 4,595

| Second round lost to {{flagicon|USA}} Mackenzie McDonald

|-style="background:#cfc"

| style="text-align:center;" | 7

| style="text-align:center;" | 8

| {{flagicon|ITA}} Jannik Sinner

| style="text-align:center;" | 3,815

| style="text-align:center;" | 90

| style="text-align:center;" | 1,000

| style="text-align:center;" | 4,725

| Champion, defeated {{flagicon|AUS}} Alex de Minaur

| style="text-align:center;" | 8

| style="text-align:center;" | 9

| {{flagicon|USA}} Taylor Fritz

| style="text-align:center;" | 3,605

| style="text-align:center;" | 90

| style="text-align:center;" | 3,605

| Third round lost to {{flagicon|AUS}} Alex de Minaur

| style="text-align:center;" | 9

| style="text-align:center;" | 10

| {{flagicon|USA}} Frances Tiafoe

| style="text-align:center;" | 3,085

| style="text-align:center;" | 45

| style="text-align:center;" | 10

| style="text-align:center;" | 3,050

| First round lost to {{flagicon|CAN}} Milos Raonic [WC]

| style="text-align:center;" | 10

| style="text-align:center;" | 12

| {{nowrap|{{flagicon|CAN}} Félix Auger-Aliassime}}

| style="text-align:center;" | 2,680

| style="text-align:center;" | 180

| style="text-align:center;" | 10

| style="text-align:center;" | 2,510

| First round lost to {{flagicon|AUS}} Max Purcell [Q]

| style="text-align:center;" | 11

| style="text-align:center;" | 13

| {{flagicon|GBR}} Cameron Norrie

| style="text-align:center;" | 2,505

| style="text-align:center;" | 90

| style="text-align:center;" | 10

| style="text-align:center;" | 2,425

| First round lost to {{flagicon|AUS}} Alex de Minaur

| style="text-align:center;" | 12

| style="text-align:center;" | 14

| {{flagicon|USA}} Tommy Paul

| style="text-align:center;" | 2,345

| style="text-align:center;" | 180

| style="text-align:center;" | 360

| style="text-align:center;" | 2,525

| Semifinals lost to {{flagicon|ITA}} Jannik Sinner [7]

| style="text-align:center;" | 13

| style="text-align:center;" | 16

| {{flagicon|GER}} Alexander Zverev

| style="text-align:center;" | 2,265

| style="text-align:center;" | 0

| style="text-align:center;" | 45

| style="text-align:center;" | 2,310

| {{nowrap|Second round lost to {{flagicon|ESP}} Alejandro Davidovich Fokina}}

| style="text-align:center;" | 14

| style="text-align:center;" | 15

| {{flagicon|CRO}} Borna Ćorić

| style="text-align:center;" | 2,315

| style="text-align:center;" | 10

| style="text-align:center;" | 2,315

| First round lost to {{flagicon|AUS}} Aleksandar Vukic [LL]

| style="text-align:center;" | 15

| style="text-align:center;" | 17

| {{flagicon|POL}} Hubert Hurkacz

| style="text-align:center;" | 2,195

| style="text-align:center;" | 600

| style="text-align:center;" | 90

| style="text-align:center;" | 1,685

| Third round lost to {{flagicon|ESP}} Carlos Alcaraz [1]

| style="text-align:center;" | 16

| style="text-align:center;" | 19

| {{flagicon|ITA}} Lorenzo Musetti

| style="text-align:center;" | 1,950

| style="text-align:center;" | (45)^†

| style="text-align:center;" | 90

| style="text-align:center;" | 1,995

| Third round lost to {{flagicon|}} Daniil Medvedev [2]

† The player did not qualify for the event in 2022. Points from his 19th best result will be deducted instead.

= Withdrawn players =

The following players would have been seeded, but withdrew before the tournament began.

class="wikitable sortable"
Rank ! style="width:185px;" \|Player ! style="width:75px;" \|Points before ! style="width:110px;" \|Points defending ! style="width:75px;" \|Points after ! style="width:350px;" \|Withdrawal reason
style="text-align:center;" \| 2 \| {{flagicon\|SRB}} Novak Djokovic \| style="text-align:center;" \| 8,795 \| style="text-align:center;" \| 0 \| style="text-align:center;" \| 8,795 \| Fatigue{{cite web \|url=https://apnews.com/article/djokovic-tennis-withdrawal-da671036ae69bb1c5a32be9b0af5bfe9\|date=2023-07-23\|title=Novak Djokovic withdraws from Toronto tournament, opts for more rest after loss in Wimbledon final\|website=apnews.com}}
style="text-align:center;" \| 11 \| {{flagicon

class="wikitable sortable"

Rank

! style="width:185px;" |Player

! style="width:75px;" |Points before

! style="width:110px;" |Points defending

! style="width:75px;" |Points after

! style="width:350px;" |Withdrawal reason

style="text-align:center;" | 2

| {{flagicon|SRB}} Novak Djokovic

| style="text-align:center;" | 8,795

| style="text-align:center;" | 0

| style="text-align:center;" | 8,795

| Fatigue{{cite web |url=https://apnews.com/article/djokovic-tennis-withdrawal-da671036ae69bb1c5a32be9b0af5bfe9|date=2023-07-23|title=Novak Djokovic withdraws from Toronto tournament, opts for more rest after loss in Wimbledon final|website=apnews.com}}

style="text-align:center;" | 11

| {{flagicon

} Karen Khachanov

| style="text-align:center;" | 2,900

| style="text-align:center;" | 45

| style="text-align:center;" | 2,855

| Injury

Other entry information

=Wild cards=

{{columns-list|colwidth=30em|

{{flagicon|CAN}} Gabriel Diallo
{{flagicon|CAN}} Alexis Galarneau
{{flagicon|CAN}} Vasek Pospisil
{{flagicon|CAN}} Milos Raonic

}}

=Protected ranking=

{{columns-list|colwidth=30em|

{{flagicon|FRA}} Gaël Monfils

}}

=Withdrawals=

{{columns-list|colwidth=30em|

{{flagicon|ESP}} Roberto Bautista Agut → replaced by {{flagicon|FRA}} Grégoire Barrère
{{flagicon|ESP}} Pablo Carreño Busta → replaced by {{flagicon|USA}} J. J. Wolf
{{flagicon|CRO}} Marin Čilić → replaced by {{flagicon|CHN}} Zhang Zhizhen
{{flagicon|BUL}} Grigor Dimitrov → replaced by {{flagicon|AUS}} Aleksandar Vukic
{{flagicon|SRB}} Novak Djokovic → replaced by {{flagicon|USA}} Christopher Eubanks
{{flagicon|}} Karen Khachanov → replaced by {{flagicon|}} Aslan Karatsev
{{flagicon|AUS}} Nick Kyrgios → replaced by {{flagicon|FIN}} Emil Ruusuvuori
{{flagicon|CAN}} Denis Shapovalov → replaced by {{flagicon|USA}} Mackenzie McDonald
{{flagicon|GER}} Jan-Lennard Struff → replaced by {{flagicon|ESP}} Bernabé Zapata Miralles

}}

Qualifying

=Seeds=

{{columns-list|colwidth=30em|

{{flagicon|AUS}} Aleksandar Vukic (qualifying competition, lucky loser)
{{flagicon|ITA}} Matteo Arnaldi (qualified)
{{flagicon|USA}} Marcos Giron (qualified)
{{flagicon|AUS}} Christopher O'Connell (qualifying competition)
{{flagicon|AUS}} Max Purcell (qualified)
{{flagicon|FRA}} Corentin Moutet (qualifying competition)
{{flagicon|AUS}} Thanasi Kokkinakis (qualified)
{{flagicon|ARG}} Diego Schwartzman (qualified)
{{flagicon|USA}} Maxime Cressy (first round)
{{flagicon|MDA}} Radu Albot (qualifying competition)
{{flagicon|JPN}} Yosuke Watanuki (withdrew)
{{flagicon|CHI}} Cristian Garín (qualified)
{{flagicon|FRA}} Constant Lestienne (qualifying competition)
{{flagicon|JPN}} Taro Daniel (qualified)

}}

=Qualifiers=

{{columns-list|colwidth=30em|

{{flagicon|ARG}} Diego Schwartzman
{{flagicon|ITA}} Matteo Arnaldi
{{flagicon|USA}} Marcos Giron
{{flagicon|CHI}} Cristian Garín
{{flagicon|AUS}} Max Purcell
{{flagicon|JPN}} Taro Daniel
{{flagicon|AUS}} Thanasi Kokkinakis

}}

=Lucky loser=

{{columns-list|colwidth=30em|

{{flagicon|AUS}} Aleksandar Vukic

}}

=Draw=

==First qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=1

| RD1-team1={{flagicon|AUS}} Aleksandar Vukic

| RD1-score1-1=6

| RD1-score1-2=6

| RD1-score1-3=

| RD1-seed2=WC

| RD1-team2={{flagicon|CAN}} Dan Martin

| RD1-score2-1=3

| RD1-score2-2=4

| RD1-score2-3=

| RD1-seed3=WC

| RD1-team3={{flagicon|CAN}} Liam Draxl

| RD1-score3-1=6⁶

| RD1-score3-2=4

| RD1-score3-3=

| RD1-seed4=8

| RD1-team4={{flagicon|ARG}} Diego Schwartzman

| RD1-score4-1=7⁸

| RD1-score4-2=6

| RD1-score4-3=

| RD2-seed1=1

| RD2-team1={{flagicon|AUS}} Aleksandar Vukic

| RD2-score1-1=4

| RD2-score1-2=4

| RD2-score1-3=

| RD2-seed2=8

| RD2-team2={{flagicon|ARG}} Diego Schwartzman

| RD2-score2-1=6

| RD2-score2-2=6

| RD2-score2-3=

}}

==Second qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=2

| RD1-team1={{flagicon|ITA}} Matteo Arnaldi

| RD1-score1-1=6

| RD1-score1-2=6

| RD1-score1-3=

| RD1-seed2=

| RD1-team2={{flagicon|USA}} Aleksandar Kovacevic

| RD1-score2-1=4

| RD1-score2-2=4

| RD1-score2-3=

| RD1-seed3=

| RD1-team3={{flagicon|}} Ilya Ivashka

| RD1-score3-1=2

| RD1-score3-2=6³

| RD1-score3-3=

| RD1-seed4=Alt

| RD1-team4={{flagicon|CRO}} Matija Pecotić

| RD1-score4-1=6

| RD1-score4-2=7⁷

| RD1-score4-3=

| RD2-seed1=2

| RD2-team1={{flagicon|ITA}} Matteo Arnaldi

| RD2-score1-1=6

| RD2-score1-2=6

| RD2-score1-3=

| RD2-seed2=Alt

| RD2-team2={{flagicon|CRO}} Matija Pecotić

| RD2-score2-1=4

| RD2-score2-2=4

| RD2-score2-3=

}}

==Third qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=3

| RD1-team1={{flagicon|USA}} Marcos Giron

| RD1-score1-1=6

| RD1-score1-2=3

| RD1-score1-3=6

| RD1-seed2=

| RD1-team2={{flagicon|USA}} Nick Chappell

| RD1-score2-1=4

| RD1-score2-2=6

| RD1-score2-3=2

| RD1-seed3=Alt

| RD1-team3={{flagicon|IND}} Mukund Sasikumar

| RD1-score3-1=2

| RD1-score3-2=5

| RD1-score3-3=

| RD1-seed4=10

| RD1-team4={{flagicon|MDA}} Radu Albot

| RD1-score4-1=6

| RD1-score4-2=7

| RD1-score4-3=

| RD2-seed1=3

| RD2-team1={{flagicon|USA}} Marcos Giron

| RD2-score1-1=6

| RD2-score1-2=6

| RD2-score1-3=

| RD2-seed2=10

| RD2-team2={{flagicon|MDA}} Radu Albot

| RD2-score2-1=3

| RD2-score2-2=1

| RD2-score2-3=

}}

==Fourth qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=4

| RD1-team1={{flagicon|AUS}} Christopher O'Connell

| RD1-score1-1=6

| RD1-score1-2=2

| RD1-score1-3=6

| RD1-seed2=PR

| RD1-team2={{flagicon|USA}} Thai-Son Kwiatkowski

| RD1-score2-1=2

| RD1-score2-2=6

| RD1-score2-3=4

| RD1-seed3=

| RD1-team3={{flagicon|FRA}} Maxime Janvier

| RD1-score3-1=3

| RD1-score3-2=3

| RD1-score3-3=

| RD1-seed4=12

| RD1-team4={{flagicon|CHI}} Cristian Garín

| RD1-score4-1=6

| RD1-score4-2=6

| RD1-score4-3=

| RD2-seed1=4

| RD2-team1={{flagicon|AUS}} Christopher O'Connell

| RD2-score1-1=6⁶

| RD2-score1-2=4

| RD2-score1-3=

| RD2-seed2=12

| RD2-team2={{flagicon|CHI}} Cristian Garín

| RD2-score2-1=7⁸

| RD2-score2-2=6

| RD2-score2-3=

}}

==Fifth qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=5

| RD1-team1={{flagicon|AUS}} Max Purcell

| RD1-score1-1=6

| RD1-score1-2=6

| RD1-score1-3=

| RD1-seed2=PR

| RD1-team2={{flagicon|CAN}} Peter Polansky

| RD1-score2-1=2

| RD1-score2-2=4

| RD1-score2-3=

| RD1-seed3=WC

| RD1-team3={{flagicon|CAN}} Brayden Schnur

| RD1-score3-1=4

| RD1-score3-2=7⁷

| RD1-score3-3=7

| RD1-seed4=9

| RD1-team4={{flagicon|USA}} Maxime Cressy

| RD1-score4-1=6

| RD1-score4-2=6²

| RD1-score4-3=5

| RD2-seed1=5

| RD2-team1={{flagicon|AUS}} Max Purcell

| RD2-score1-1=6

| RD2-score1-2=6

| RD2-score1-3=

| RD2-seed2=WC

| RD2-team2={{flagicon|CAN}} Brayden Schnur

| RD2-score2-1=2

| RD2-score2-2=1

| RD2-score2-3=

}}

==Sixth qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=6

| RD1-team1={{flagicon|FRA}} Corentin Moutet

| RD1-score1-1=6

| RD1-score1-2=6

| RD1-score1-3=

| RD1-seed2=WC

| RD1-team2={{flagicon|CAN}} Justin Boulais

| RD1-score2-1=0

| RD1-score2-2=3

| RD1-score2-3=

| RD1-seed3=

| RD1-team3={{flagicon|AUS}} Dane Sweeny

| RD1-score3-1=6⁴

| RD1-score3-2=5

| RD1-score3-3=

| RD1-seed4=14

| RD1-team4={{flagicon|JPN}} Taro Daniel

| RD1-score4-1=7⁷

| RD1-score4-2=7

| RD1-score4-3=

| RD2-seed1=6

| RD2-team1={{flagicon|FRA}} Corentin Moutet

| RD2-score1-1=6⁸

| RD2-score1-2=2

| RD2-score1-3=

| RD2-seed2=14

| RD2-team2={{flagicon|JPN}} Taro Daniel

| RD2-score2-1=7¹⁰

| RD2-score2-2=6

| RD2-score2-3=

}}

==Seventh qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

|team-width=175

| RD1-seed1=7

| RD1-team1={{flagicon|AUS}} Thanasi Kokkinakis

| RD1-score1-1=7⁷

| RD1-score1-2=4

| RD1-score1-3=7

| RD1-seed2=

| RD1-team2={{flagicon|CRO}} Borna Gojo

| RD1-score2-1=6⁴

| RD1-score2-2=6

| RD1-score2-3=5

| RD1-seed3=

| RD1-team3={{flagicon|AUS}} James Duckworth

| RD1-score3-1=1

| RD1-score3-2=6

| RD1-score3-3=4

| RD1-seed4=13

| RD1-team4={{flagicon|FRA}} Constant Lestienne

| RD1-score4-1=6

| RD1-score4-2=2

| RD1-score4-3=6

| RD2-seed1=7

| RD2-team1={{flagicon|AUS}} Thanasi Kokkinakis

| RD2-score1-1=7⁸

| RD2-score1-2=6

| RD2-score1-3=

| RD2-seed2=13

| RD2-team2={{flagicon|FRA}} Constant Lestienne

| RD2-score2-1=6⁶

| RD2-score2-2=3

| RD2-score2-3=

}}

References

External links

[http://www.protennislive.com/posting/2023/421/mds.pdf Main draw]
[http://www.protennislive.com/posting/2023/421/qs.pdf Qualifying draw]

National Bank Open