2021 National Bank Open – Men's doubles

{{Short description|Tennis tournament}}

{{Use mdy dates|date=January 2025}}

{{One source|date=October 2021}}

{{Infobox tennis tournament event|2021|National Bank Open|s

| champ = {{flagicon|USA}} Rajeev Ram
{{flagicon|GBR}} Joe Salisbury

| runner = {{flagicon|CRO}} Nikola Mektić
{{flagicon|CRO}} Mate Pavić

| score = 6–3, 4–6, [10–3]

| before_name = Rogers Cup – Men's doubles

| before_year = 2019

}}

{{main|2021 National Bank Open}}

Marcel Granollers and Horacio Zeballos were the defending champions from when the tournament was last held in 2019,{{Cite web|title=Granollers/Zeballos Triumph In Montreal On Team Debut {{!}} ATP Tour {{!}} Tennis|url=http://www.atptour.com/en/news/granollers-zeballos-haase-koolhof-montreal-2019-doubles-final|access-date=2021-08-20|website=ATP Tour}} but withdrew before the tournament began.

Rajeev Ram and Joe Salisbury won the title, defeating Nikola Mektić and Mate Pavić in the final, 6–3, 4–6, [10–3]. By reaching the finals, the Croatian tandem became the second team since the Bryans in 2014, to reach 5 consecutive Masters 1000 finals.

Seeds

The top four seeds receive a bye into the second round.

{{columns-list|colwidth=30em|

  1. {{flagicon|CRO}} Nikola Mektić / {{flagicon|CRO}} Mate Pavić (final)
  2. {{flagicon|COL}} Juan Sebastián Cabal / {{flagicon|COL}} Robert Farah (quarterfinals)
  3. {{flagicon|USA}} Rajeev Ram / {{flagicon|GBR}} Joe Salisbury (champions)
  4. {{flagicon|GER}} Kevin Krawietz / {{flagicon|ROU}} Horia Tecău (semifinals)
  5. {{flagicon|POL}} Łukasz Kubot / {{flagicon|BRA}} Marcelo Melo (second round)
  6. {{flagicon|AUS}} John Peers / {{flagicon|SVK}} Filip Polášek (first round)
  7. {{flagicon|GER}} Tim Pütz / {{flagicon|NZL}} Michael Venus (first round)
  8. {{flagicon|IND}} Rohan Bopanna / {{flagicon|CRO}} Ivan Dodig (quarterfinals)

}}

Draw

{{Draw key}}

=Finals=

{{4TeamBracket-Tennis3-v2

| RD1=Semifinals

| RD2=Final

|team-width=175

| RD1-seed1=1

| RD1-team1={{flagicon|CRO}} Nikola Mektić
{{flagicon|CRO}} Mate Pavić

| RD1-score1-1=77

| RD1-score1-2=714

| RD1-score1-3=

| RD1-seed2=4

| RD1-team2={{flagicon|GER}} Kevin Krawietz
{{flagicon|ROU}} Horia Tecău

| RD1-score2-1=63

| RD1-score2-2=612

| RD1-score2-3=

| RD1-seed3=3

| RD1-team3={{flagicon|USA}} Rajeev Ram
{{flagicon|GBR}} Joe Salisbury

| RD1-score3-1=6

| RD1-score3-2=7

| RD1-score3-3=

| RD1-seed4=

| RD1-team4={{flagicon|BEL}} Sander Gillé
{{flagicon|BEL}} Joran Vliegen

| RD1-score4-1=3

| RD1-score4-2=5

| RD1-score4-3=

| RD2-seed1=1

| RD2-team1={{flagicon|CRO}} Nikola Mektić
{{flagicon|CRO}} Mate Pavić

| RD2-score1-1=3

| RD2-score1-2=6

| RD2-score1-3=[3]

| RD2-seed2=3

| RD2-team2={{flagicon|USA}} Rajeev Ram
{{flagicon|GBR}} Joe Salisbury

| RD2-score2-1=6

| RD2-score2-2=4

| RD2-score2-3=[10]

}}

=Top half=

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Quarterfinals

| RD4=Semifinals

| RD1-seed03=Alt

| RD1-team03={{flagicon|SRB}} M Kecmanović
{{flagicon|NOR}} C Ruud

| RD1-score03-1=5

| RD1-score03-2=3

| RD1-score03-3=

| RD1-seed04=

| RD1-team04={{flagicon|GBR}} D Evans
{{flagicon|GBR}} N Skupski

| RD1-score04-1=7

| RD1-score04-2=6

| RD1-score04-3=

| RD1-seed05=

| RD1-team05={{flagicon|GBR}} J Murray
{{flagicon|AUS}} M Purcell

| RD1-score05-1=77

| RD1-score05-2=1

| RD1-score05-3=[11]

| RD1-seed06=

| RD1-team06={{flagicon|NED}} M Middelkoop
{{flagicon|AUS}} L Saville

| RD1-score06-1=65

| RD1-score06-2=6

| RD1-score06-3=[13]

| RD1-seed07=

| RD1-team07={{flagicon|KAZ}} A Bublik
{{flagicon|CHI}} C Garín

| RD1-score07-1=6

| RD1-score07-2=6

| RD1-score07-3=

| RD1-seed08=6

| RD1-team08={{flagicon|AUS}} J Peers
{{flagicon|SVK}} F Polášek

| RD1-score08-1=4

| RD1-score08-2=4

| RD1-score08-3=

| RD1-seed11=

| RD1-team11={{flagicon|URU}} A Behar
{{flagicon|ECU}} G Escobar

| RD1-score11-1=7

| RD1-score11-2=3

| RD1-score11-3=[11]

| RD1-seed12=

| RD1-team12={{flagicon|AUT}} O Marach
{{flagicon|AUT}} P Oswald

| RD1-score12-1=5

| RD1-score12-2=6

| RD1-score12-3=[13]

| RD1-seed13=

| RD1-team13={{flagicon|AUS}} A de Minaur
{{flagicon|GBR}} C Norrie

| RD1-score13-1=4

| RD1-score13-2=77

| RD1-score13-3=[8]

| RD1-seed14=

| RD1-team14={{flagicon|RUS}} A Karatsev
{{flagicon|SRB}} D Lajović

| RD1-score14-1=6

| RD1-score14-2=64

| RD1-score14-3=[10]

| RD1-seed15=

| RD1-team15={{flagicon|POL}} H Hurkacz
{{flagicon|ITA}} J Sinner

| RD1-score15-1=5

| RD1-score15-2=4

| RD1-score15-3=

| RD1-seed16=5

| RD1-team16={{flagicon|POL}} Ł Kubot
{{flagicon|BRA}} M Melo

| RD1-score16-1=7

| RD1-score16-2=6

| RD1-score16-3=

| RD2-seed01=1

| RD2-team01={{flagicon|CRO}} N Mektić
{{flagicon|CRO}} M Pavić

| RD2-score01-1=3

| RD2-score01-2=7

| RD2-score01-3=[13]

| RD2-seed02=

| RD2-team02={{flagicon|GBR}} D Evans
{{flagicon|GBR}} N Skupski

| RD2-score02-1=6

| RD2-score02-2=5

| RD2-score02-3=[11]

| RD2-seed03=

| RD2-team03={{flagicon|NED}} M Middelkoop
{{flagicon|AUS}} L Saville

| RD2-score03-1=6

| RD2-score03-2=1

| RD2-score03-3=

| RD2-seed04=

| RD2-team04={{flagicon|KAZ}} A Bublik
{{flagicon|CHI}} C Garín

| RD2-score04-1=3

| RD2-score04-2=0r

| RD2-score04-3=

| RD2-seed05=4

| RD2-team05={{flagicon|GER}} K Krawietz
{{flagicon|ROU}} H Tecău

| RD2-score05-1=6

| RD2-score05-2=1

| RD2-score05-3=[12]

| RD2-seed06=

| RD2-team06={{flagicon|AUT}} O Marach
{{flagicon|AUT}} P Oswald

| RD2-score06-1=2

| RD2-score06-2=6

| RD2-score06-3=[10]

| RD2-seed07=

| RD2-team07={{flagicon|RUS}} A Karatsev
{{flagicon|SRB}} D Lajović

| RD2-score07-1=6

| RD2-score07-2=6

| RD2-score07-3=

| RD2-seed08=5

| RD2-team08={{flagicon|POL}} Ł Kubot
{{flagicon|BRA}} M Melo

| RD2-score08-1=4

| RD2-score08-2=4

| RD2-score08-3=

| RD3-seed01=1

| RD3-team01={{flagicon|CRO}} N Mektić
{{flagicon|CRO}} M Pavić

| RD3-score01-1=6

| RD3-score01-2=66

| RD3-score01-3=[10]

| RD3-seed02=

| RD3-team02={{flagicon|NED}} M Middelkoop
{{flagicon|AUS}} L Saville

| RD3-score02-1=3

| RD3-score02-2=78

| RD3-score02-3=[7]

| RD3-seed03=4

| RD3-team03={{flagicon|GER}} K Krawietz
{{flagicon|ROU}} H Tecău

| RD3-score03-1=6

| RD3-score03-2=3

| RD3-score03-3=[10]

| RD3-seed04=

| RD3-team04={{flagicon|RUS}} A Karatsev
{{flagicon|SRB}} D Lajović

| RD3-score04-1=3

| RD3-score04-2=6

| RD3-score04-3=[3]

| RD4-seed01=1

| RD4-team01={{flagicon|CRO}} N Mektić
{{flagicon|CRO}} M Pavić

| RD4-score01-1=77

| RD4-score01-2=714

| RD4-score01-3=

| RD4-seed02=4

| RD4-team02={{flagicon|GER}} K Krawietz
{{flagicon|ROU}} H Tecău

| RD4-score02-1=63

| RD4-score02-2=612

| RD4-score02-3=

}}

=Bottom half=

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Quarterfinals

| RD4=Semifinals

| RD1-seed01=8

| RD1-team01={{flagicon|IND}} R Bopanna
{{flagicon|CRO}} I Dodig

| RD1-score01-1=6

| RD1-score01-2=77

| RD1-score01-3=

| RD1-seed02=

| RD1-team02={{flagicon|ITA}} F Fognini
{{flagicon|ITA}} L Sonego

| RD1-score02-1=4

| RD1-score02-2=64

| RD1-score02-3=

| RD1-seed03=WC

| RD1-team03={{flagicon|CAN}} P Polansky
{{flagicon|CAN}} B Schnur

| RD1-score03-1=4

| RD1-score03-2=1

| RD1-score03-3=

| RD1-seed04=

| RD1-team04={{flagicon|ITA}} S Bolelli
{{flagicon|ARG}} M González

| RD1-score04-1=6

| RD1-score04-2=6

| RD1-score04-3=

| RD1-seed05=

| RD1-team05={{flagicon|CRO}} M Čilić
{{flagicon|GER}} J-L Struff

| RD1-score05-1=4

| RD1-score05-2=7

| RD1-score05-3=[11]

| RD1-seed06=

| RD1-team06={{flagicon|KAZ}} A Golubev
{{flagicon|GER}} A Mies

| RD1-score06-1=6

| RD1-score06-2=5

| RD1-score06-3=[13]

| RD1-seed09=7

| RD1-team09={{flagicon|GER}} T Pütz
{{flagicon|NZL}} M Venus

| RD1-score09-1=5

| RD1-score09-2=63

| RD1-score09-3=

| RD1-seed10=

| RD1-team10={{flagicon|BEL}} S Gillé
{{flagicon|BEL}} J Vliegen

| RD1-score10-1=7

| RD1-score10-2=77

| RD1-score10-3=

| RD1-seed11=

| RD1-team11={{flagicon|RSA}} R Klaasen
{{flagicon|JPN}} B McLachlan

| RD1-score11-1=4

| RD1-score11-2=64

| RD1-score11-3=

| RD1-seed12=

| RD1-team12={{flagicon|NED}} W Koolhof
{{flagicon|USA}} A Krajicek

| RD1-score12-1=6

| RD1-score12-2=77

| RD1-score12-3=

| RD1-seed13=

| RD1-team13={{flagicon|RUS}} K Khachanov
{{flagicon|RUS}} A Rublev

| RD1-score13-1=6

| RD1-score13-2=78

| RD1-score13-3=

| RD1-seed14=WC

| RD1-team14={{flagicon|CAN}} F Auger-Aliassime
{{flagicon|CAN}} A Galarneau

| RD1-score14-1=4

| RD1-score14-2=66

| RD1-score14-3=

| RD2-seed01=8

| RD2-team01={{flagicon|IND}} R Bopanna
{{flagicon|CRO}} I Dodig

| RD2-score01-1=6

| RD2-score01-2=6

| RD2-score01-3=

| RD2-seed02=

| RD2-team02={{flagicon|ITA}} S Bolelli
{{flagicon|ARG}} M González

| RD2-score02-1=4

| RD2-score02-2=3

| RD2-score02-3=

| RD2-seed03=

| RD2-team03={{flagicon|KAZ}} A Golubev
{{flagicon|GER}} A Mies

| RD2-score03-1=3

| RD2-score03-2=2

| RD2-score03-3=

| RD2-seed04=3

| RD2-team04={{flagicon|USA}} R Ram
{{flagicon|GBR}} J Salisbury

| RD2-score04-1=6

| RD2-score04-2=6

| RD2-score04-3=

| RD2-seed05=

| RD2-team05={{flagicon|BEL}} S Gillé
{{flagicon|BEL}} J Vliegen

| RD2-score05-1=77

| RD2-score05-2=2

| RD2-score05-3=[10]

| RD2-seed06=

| RD2-team06={{flagicon|NED}} W Koolhof
{{flagicon|USA}} A Krajicek

| RD2-score06-1=65

| RD2-score06-2=6

| RD2-score06-3=[8]

| RD2-seed07=

| RD2-team07={{flagicon|RUS}} K Khachanov
{{flagicon|RUS}} A Rublev

| RD2-score07-1=3

| RD2-score07-2=4

| RD2-score07-3=

| RD2-seed08=2

| RD2-team08={{flagicon|COL}} JS Cabal
{{flagicon|COL}} R Farah

| RD2-score08-1=6

| RD2-score08-2=6

| RD2-score08-3=

| RD3-seed01=8

| RD3-team01={{flagicon|IND}} R Bopanna
{{flagicon|CRO}} I Dodig

| RD3-score01-1=6

| RD3-score01-2=3

| RD3-score01-3=[4]

| RD3-seed02=3

| RD3-team02={{flagicon|USA}} R Ram
{{flagicon|GBR}} J Salisbury

| RD3-score02-1=4

| RD3-score02-2=6

| RD3-score02-3=[10]

| RD3-seed03=

| RD3-team03={{flagicon|BEL}} S Gillé
{{flagicon|BEL}} J Vliegen

| RD3-score03-1=65

| RD3-score03-2=6

| RD3-score03-3=[10]

| RD3-seed04=2

| RD3-team04={{flagicon|COL}} JS Cabal
{{flagicon|COL}} R Farah

| RD3-score04-1=77

| RD3-score04-2=2

| RD3-score04-3=[8]

| RD4-seed01=3

| RD4-team01={{flagicon|USA}} R Ram
{{flagicon|GBR}} J Salisbury

| RD4-score01-1=6

| RD4-score01-2=7

| RD4-score01-3=

| RD4-seed02=

| RD4-team02={{flagicon|BEL}} S Gillé
{{flagicon|BEL}} J Vliegen

| RD4-score02-1=3

| RD4-score02-2=5

| RD4-score02-3=

}}

References

{{reflist}}