2021 Belgrade Open – Singles

{{Infobox tennis tournament event|2021|Belgrade Open|

| champ = {{flagicon|SRB}} Novak Djokovic

| runner = {{flagicon|SVK}} Alex Molčan

| score = 6–4, 6–3

| type = singles doubles

| edition = 1st

| after_year = 2024

}}

{{main article|2021 Belgrade Open}}

This was the first edition of the tournament, primarily created due to the one-week delay of the 2021 French Open.{{cite web|url=https://www.tennis.com/pro-game/2021/04/extra-week-roland-garros-now-filled-atp-wta-events-parma-belgrade-french-open/93747/|title=EXTRA WEEK BEFORE ROLAND GARROS NOW FILLED BY ATP AND WTA EVENTS|website=www.tennis.com}}

Novak Djokovic won the title, defeating Alex Molčan in the final, 6–4, 6–3.{{cite web| title=Djokovic Wins 83rd Career Title In Belgrade | url=https://www.atptour.com/en/news/djokovic-molcan-parma-2021-final | website = atpworldtour.com | publisher = ATP | date = 29 May 2021 | accessdate = 30 May 2021}} It was Djokovic's third title ever in a tournament held in Serbia (excluding the Davis Cup).

Seeds

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

{{columns-list|colwidth=30em|

  1. {{flagicon|SRB}} Novak Djokovic (champion)
  2. {{flagicon|FRA}} Gaël Monfils (second round)
  3. {{flagicon|GEO}} Nikoloz Basilashvili (second round)
  4. {{flagicon|FRA}} Adrian Mannarino (second round)
  5. {{flagicon|SRB}} Dušan Lajović (quarterfinals)
  6. {{flagicon|SRB}} Filip Krajinović (withdrew)
  7. {{flagicon|SRB}} Miomir Kecmanović (first round)
  8. {{flagicon|ARG}} Federico Delbonis (semifinals)

}}

Draw

{{Draw key}}

=Finals=

{{4TeamBracket-Tennis3-v2

| RD1=Semifinals

| RD2=Final

| team-width=175

| RD1-seed1=1

| RD1-team1={{flagicon|SRB}} Novak Djokovic

| RD1-score1-1=6

| RD1-score1-2=4

| RD1-score1-3=6

| RD1-seed2=Q

| RD1-team2={{flagicon|SVK}} Andrej Martin

| RD1-score2-1=1

| RD1-score2-2=6

| RD1-score2-3=0

| RD1-seed3=Q

| RD1-team3={{flagicon|SVK}} Alex Molčan

| RD1-score3-1=4

| RD1-score3-2=6

| RD1-score3-3=6

| RD1-seed4=8

| RD1-team4={{flagicon|ARG}} Federico Delbonis

| RD1-score4-1=6

| RD1-score4-2=4

| RD1-score4-3=4

| RD2-seed1=1

| RD2-team1={{flagicon|SRB}} Novak Djokovic

| RD2-score1-1=6

| RD2-score1-2=6

| RD2-seed2=Q

| RD2-team2={{flagicon|SVK}} Alex Molčan

| RD2-score2-1=4

| RD2-score2-2=3

}}

=Top half=

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Quarterfinals

| RD4=Semifinals

| RD1-seed03=LL

| RD1-team03={{flagicon|GER}} M Moraing

| RD1-score03-1=4

| RD1-score03-2=79

| RD1-score03-3=7

| RD1-seed04= 

| RD1-team04={{flagicon|BLR}} E Gerasimov

| RD1-score04-1=6

| RD1-score04-2=67

| RD1-score04-3=5

| RD1-seed05=WC

| RD1-team05={{flagicon|SRB}} M Topo

| RD1-score05-1=6

| RD1-score05-2=2

| RD1-score05-3=0

| RD1-seed06=Alt

| RD1-team06={{flagicon|ARG}} F Coria

| RD1-score06-1=4

| RD1-score06-2=6

| RD1-score06-3=6

| RD1-seed07= 

| RD1-team07={{flagicon|URU}} P Cuevas

| RD1-score07-1=6

| RD1-score07-2=6

| RD1-score07-3=

| RD1-seed08=7

| RD1-team08={{flagicon|SRB}} M Kecmanović

| RD1-score08-1=3

| RD1-score08-2=2

| RD1-score08-3=

| RD1-seed11=Q

| RD1-team11={{flagicon|AUS}} C O'Connell

| RD1-score11-1=6

| RD1-score11-2=67

| RD1-score11-3=5

| RD1-seed12=Q

| RD1-team12={{flagicon|SVK}} A Martin

| RD1-score12-1=3

| RD1-score12-2=79

| RD1-score12-3=7

| RD1-seed13= 

| RD1-team13={{flagicon|USA}} T Sandgren

| RD1-score13-1=4

| RD1-score13-2=2

| RD1-score13-3=

| RD1-seed14= 

| RD1-team14={{flagicon|FRA}} J Chardy

| RD1-score14-1=6

| RD1-score14-2=6

| RD1-score14-3=

| RD1-seed15= 

| RD1-team15={{flagicon|LTU}} R Berankis

| RD1-score15-1=3

| RD1-score15-2=3

| RD1-score15-3=

| RD1-seed16=5

| RD1-team16={{flagicon|SRB}} D Lajović

| RD1-score16-1=6

| RD1-score16-2=6

| RD1-score16-3=

| RD2-seed01=1

| RD2-team01={{flagicon|SRB}} N Djokovic

| RD2-score01-1=6

| RD2-score01-2=77

| RD2-score01-3=

| RD2-seed02=LL

| RD2-team02={{flagicon|GER}} M Moraing

| RD2-score02-1=2

| RD2-score02-2=64

| RD2-score02-3=

| RD2-seed03=Alt

| RD2-team03={{flagicon|ARG}} F Coria

| RD2-score03-1=6

| RD2-score03-2=6

| RD2-score03-3=

| RD2-seed04=

| RD2-team04={{flagicon|URU}} P Cuevas

| RD2-score04-1=3

| RD2-score04-2=2

| RD2-score04-3=

| RD2-seed05=3

| RD2-team05={{flagicon|GEO}} N Basilashvili

| RD2-score05-1=1

| RD2-score05-2=6

| RD2-score05-3=64

| RD2-seed06=Q

| RD2-team06={{flagicon|SVK}} A Martin

| RD2-score06-1=6

| RD2-score06-2=4

| RD2-score06-3=77

| RD2-seed07=

| RD2-team07={{flagicon|FRA}} J Chardy

| RD2-score07-1=3

| RD2-score07-2=4

| RD2-score07-3=

| RD2-seed08=5

| RD2-team08={{flagicon|SRB}} D Lajović

| RD2-score08-1=6

| RD2-score08-2=6

| RD2-score08-3=

| RD3-seed01=1

| RD3-team01={{flagicon|SRB}} N Djokovic

| RD3-score01-1=6

| RD3-score01-2=6

| RD3-score01-3=

| RD3-seed02=Alt

| RD3-team02={{flagicon|ARG}} F Coria

| RD3-score02-1=1

| RD3-score02-2=0

| RD3-score02-3=

| RD3-seed03=Q

| RD3-team03={{flagicon|SVK}} A Martin

| RD3-score03-1=3

| RD3-score03-2=6

| RD3-score03-3=6

| RD3-seed04=5

| RD3-team04={{flagicon|SRB}} D Lajović

| RD3-score04-1=6

| RD3-score04-2=3

| RD3-score04-3=4

| RD4-seed01=1

| RD4-team01={{flagicon|SRB}} N Djokovic

| RD4-score01-1=6

| RD4-score01-2=4

| RD4-score01-3=6

| RD4-seed02=Q

| RD4-team02={{flagicon|SVK}} A Martin

| RD4-score02-1=1

| RD4-score02-2=6

| RD4-score02-3=0

}}

=Bottom half=

{{16TeamBracket-Compact-Tennis3-Byes

| RD1=First round

| RD2=Second round

| RD3=Quarterfinals

| RD4=Semifinals

| RD1-seed01=Q

| RD1-team01={{flagicon|SVK}} A Molčan

| RD1-score01-1=6

| RD1-score01-2=6

| RD1-score01-3=

| RD1-seed02=WC

| RD1-team02={{flagicon|SRB}} H Međedović

| RD1-score02-1=4

| RD1-score02-2=3

| RD1-score02-3=

| RD1-seed03=WC

| RD1-team03={{flagicon|SRB}} P Krstin

| RD1-score03-1=6

| RD1-score03-2=3

| RD1-score03-3=6

| RD1-seed04= 

| RD1-team04={{flagicon|KOR}} S-w Kwon

| RD1-score04-1=2

| RD1-score04-2=6

| RD1-score04-3=1

| RD1-seed05= 

| RD1-team05={{flagicon|FRA}} L Pouille

| RD1-score05-1=5

| RD1-score05-2=2

| RD1-score05-3=

| RD1-seed06= 

| RD1-team06={{flagicon|ESP}} F Verdasco

| RD1-score06-1=7

| RD1-score06-2=6

| RD1-score06-3=

| RD1-seed09=8

| RD1-team09={{flagicon|ARG}} F Delbonis

| RD1-score09-1=3

| RD1-score09-2=6

| RD1-score09-3=6

| RD1-seed10=LL

| RD1-team10={{flagicon|SVK}} L Klein

| RD1-score10-1=6

| RD1-score10-2=3

| RD1-score10-3=4

| RD1-seed11= 

| RD1-team11={{flagicon|MDA}} R Albot

| RD1-score11-1=2

| RD1-score11-2=2

| RD1-score11-3=

| RD1-seed12= 

| RD1-team12={{flagicon|BRA}} T Monteiro

| RD1-score12-1=6

| RD1-score12-2=6

| RD1-score12-3=

| RD1-seed13=SE

| RD1-team13={{flagicon|FRA}} A Rinderknech

| RD1-score13-1=0

| RD1-score13-2=4

| RD1-score13-3=

| RD1-seed14=Q

| RD1-team14={{flagicon|ESP}} R Carballés Baena

| RD1-score14-1=6

| RD1-score14-2=6

| RD1-score14-3=

| RD2-seed01=Q

| RD2-team01={{flagicon|SVK}} A Molčan

| RD2-score01-1=6

| RD2-score01-2=6

| RD2-score01-3=

| RD2-seed02=WC

| RD2-team02={{flagicon|SRB}} P Krstin

| RD2-score02-1=0

| RD2-score02-2=0

| RD2-score02-3=

| RD2-seed03=

| RD2-team03={{flagicon|ESP}} F Verdasco

| RD2-score03-1=77

| RD2-score03-2=6

| RD2-score03-3=

| RD2-seed04=4

| RD2-team04={{flagicon|FRA}} A Mannarino

| RD2-score04-1=64

| RD2-score04-2=0

| RD2-score04-3=

| RD2-seed05=8

| RD2-team05={{flagicon|ARG}} F Delbonis

| RD2-score05-1=78

| RD2-score05-2=3

| RD2-score05-3=6

| RD2-seed06=

| RD2-team06={{flagicon|BRA}} T Monteiro

| RD2-score06-1=66

| RD2-score06-2=6

| RD2-score06-3=4

| RD2-seed07=Q

| RD2-team07={{flagicon|ESP}} R Carballés Baena

| RD2-score07-1=6

| RD2-score07-2=3

| RD2-score07-3=77

| RD2-seed08=2

| RD2-team08={{flagicon|FRA}} G Monfils

| RD2-score08-1=1

| RD2-score08-2=6

| RD2-score08-3=64

| RD3-seed01=Q

| RD3-team01={{flagicon|SVK}} A Molčan

| RD3-score01-1=6

| RD3-score01-2=6

| RD3-score01-3=

| RD3-seed02=

| RD3-team02={{flagicon|ESP}} F Verdasco

| RD3-score02-1=2

| RD3-score02-2=0

| RD3-score02-3=

| RD3-seed03=8

| RD3-team03={{flagicon|ARG}} F Delbonis

| RD3-score03-1=w/o

| RD3-score03-2=

| RD3-score03-3=

| RD3-seed04=Q

| RD3-team04={{flagicon|ESP}} R Carballés Baena

| RD3-score04-1=

| RD3-score04-2=

| RD3-score04-3=

| RD4-seed01=Q

| RD4-team01={{flagicon|SVK}} A Molčan

| RD4-score01-1=4

| RD4-score01-2=6

| RD4-score01-3=6

| RD4-seed02=8

| RD4-team02={{flagicon|ARG}} F Delbonis

| RD4-score02-1=6

| RD4-score02-2=4

| RD4-score02-3=4

}}

Qualifying

=Seeds=

{{columns-list|colwidth=30em|

  1. {{flagicon|ARG}} Federico Coria (moved to main draw)
  2. {{flagicon|ESP}} Roberto Carballés Baena (qualified)
  3. {{flagicon|SVK}} Andrej Martin (qualified)
  4. {{flagicon|AUS}} Christopher O'Connell (qualified)
  5. {{flagicon|GER}} Mats Moraing (qualifying competition, lucky loser)
  6. {{flagicon|SVK}} Lukáš Klein (qualifying competition, lucky loser)
  7. {{flagicon|CZE}} Vít Kopřiva (qualifying competition)
  8. {{flagicon|SVK}} Alex Molčan (qualified)

}}

=Qualifiers=

{{columns-list|colwidth=30em|

  1. {{flagicon|SVK}} Alex Molčan
  2. {{flagicon|ESP}} Roberto Carballés Baena
  3. {{flagicon|SVK}} Andrej Martin
  4. {{flagicon|AUS}} Christopher O'Connell

}}

=Lucky losers=

{{columns-list|colwidth=30em|

  1. {{flagicon|GER}} Mats Moraing
  2. {{flagicon|SVK}} Lukáš Klein

}}

=Qualifying draw=

==First qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

| team-width=175

| RD1-seed1=Alt

| RD1-team1={{flagicon|AUS}} John-Patrick Smith

| RD1-score1-1=4

| RD1-score1-2=65

| RD1-score1-3=

| RD1-seed2=WC

| RD1-team2={{flagicon|ESP}} Carlos Gómez-Herrera

| RD1-score2-1=6

| RD1-score2-2=77

| RD1-score2-3=

| RD1-seed3=Alt

| RD1-team3={{flagicon|BIH}} Nerman Fatić

| RD1-score3-1=4

| RD1-score3-2=1

| RD1-score3-3=

| RD1-seed4=8

| RD1-team4={{flagicon|SVK}} Alex Molčan

| RD1-score4-1=6

| RD1-score4-2=6

| RD1-score4-3=

| RD2-seed1=WC

| RD2-team1={{flagicon|ESP}} Carlos Gómez-Herrera

| RD2-score1-1=3

| RD2-score1-2=68

| RD2-score1-3=

| RD2-seed2=8

| RD2-team2={{flagicon|SVK}} Alex Molčan

| RD2-score2-1=6

| RD2-score2-2=710

| RD2-score2-3=

}}

==Second qualifier==

{{4TeamBracket-Tennis3-v2

| RD1=First round

| RD2=Qualifying competition

| team-width=175

| RD1-seed1=2

| RD1-team1={{flagicon|ESP}} Roberto Carballés Baena

| RD1-score1-1=6

| RD1-score1-2=6

| RD1-score1-3=

| RD1-seed2= 

| RD1-team2={{flagicon|BIH}} Mirza Bašić

| RD1-score2-1=2

| RD1-score2-2=3

| RD1-score2-3=

| RD1-seed3= 

| RD1-team3={{flagicon|RUS}} Alexey Vatutin

| RD1-score3-1=3

| RD1-score3-2=6

| RD1-score3-3=4

| RD1-seed4=7

| RD1-team4={{flagicon|CZE}} Vít Kopřiva

| RD1-score4-1=6

| RD1-score4-2=3

| RD1-score4-3=6

| RD2-seed1=2

| RD2-team1={{flagicon|ESP}} Roberto Carballés Baena

| RD2-score1-1=6

| RD2-score1-2=6

| RD2-score1-3=

| RD2-seed2=7

| RD2-team2={{flagicon|CZE}} Vít Kopřiva

| 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|SVK}} Andrej Martin

| RD1-score1-1=6

| RD1-score1-2=6

| RD1-score1-3=

| RD1-seed2= 

| RD1-team2={{flagicon|AUS}} Akira Santillan

| RD1-score2-1=3

| RD1-score2-2=3

| RD1-score2-3=

| RD1-seed3= 

| RD1-team3={{flagicon|TUN}} Malek Jaziri

| RD1-score3-1=3

| RD1-score3-2=4

| RD1-score3-3=

| RD1-seed4=5

| RD1-team4={{flagicon|GER}} Mats Moraing

| RD1-score4-1=6

| RD1-score4-2=6

| RD1-score4-3=

| RD2-seed1=3

| RD2-team1={{flagicon|SVK}} Andrej Martin

| RD2-score1-1=6

| RD2-score1-2=6

| RD2-score1-3=

| RD2-seed2=5

| RD2-team2={{flagicon|GER}} Mats Moraing

| RD2-score2-1=1

| RD2-score2-2=3

| 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=6

| RD1-score1-3=

| RD1-seed2= 

| RD1-team2={{flagicon|BAR}} Darian King

| RD1-score2-1=1

| RD1-score2-2=3

| RD1-score2-3=

| RD1-seed3=WC

| RD1-team3={{flagicon|SRB}} Marko Tepavac

| RD1-score3-1=4

| RD1-score3-2=1

| RD1-score3-3=

| RD1-seed4=6

| RD1-team4={{flagicon|SVK}} Lukáš Klein

| RD1-score4-1=6

| RD1-score4-2=6

| RD1-score4-3=

| RD2-seed1=4

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

| RD2-score1-1=79

| RD2-score1-2=7

| RD2-score1-3=

| RD2-seed2=6

| RD2-team2={{flagicon|SVK}} Lukáš Klein

| RD2-score2-1=67

| RD2-score2-2=5

| RD2-score2-3=

}}

References

{{reflist}}