Western & Southern Open 2021 - Đôi nam

Marcel Granollers Horacio Zeballos
| runner = Steve Johnson Austin Krajicek
| score = 7–6(7–5), 7–6(7–5)
| draw = 28 (3)
| seeds = 8
}}

Pablo Carreño Busta và Alex de Minaur là đương kim vô địch, nhưng Carreño Busta chọn không tham dự. De Minaur đánh cặp với Cameron Norrie, nhưng thua ở vòng tứ kết trước Marcel Granollers và Horacio Zeballos.

Granollers và Zeballos là nhà vô địch, đánh bại Steve Johnson và Austin Krajicek trong trận chung kết, 7–6(7–5), 7–6(7–5).

Hạt giống
4 hạt giống hàng đầu được miễn vào vòng 2.
Nikola Mektić / Mate Pavić (Vòng 2)
Marcel Granollers / Horacio Zeballos (Vô địch)
Juan Sebastián Cabal / Robert Farah (Bán kết)
Rajeev Ram / Joe Salisbury (Tứ kết)
Kevin Krawietz / Horia Tecău (Vòng 2)
John Peers / Filip Polášek (Vòng 2)
Łukasz Kubot / Marcelo Melo (Vòng 1)
Raven Klaasen / Ben McLachlan (Vòng 1)
}}

Kết quả

Chung kết
Steve Johnson Austin Krajicek
| RD1-score1-1=77
| RD1-score1-2=68
| RD1-score1-3=[10]
| RD1-seed2=3
| RD1-team2= Juan Sebastián Cabal Robert Farah
| RD1-score2-1=65
| RD1-score2-2=710
| RD1-score2-3=[3]

| RD1-seed3=Alt
| RD1-team3= Marcelo Arévalo Fabio Fognini
| RD1-score3-1=3
| RD1-score3-2=4
| RD1-score3-3=
| RD1-seed4=2
| RD1-team4= Marcel Granollers Horacio Zeballos
| RD1-score4-1=6
| RD1-score4-2=6
| RD1-score4-3=

| RD2-seed1=WC
| RD2-team1= Steve Johnson Austin Krajicek
| RD2-score1-1=65
| RD2-score1-2=65
| RD2-score1-3=
| RD2-seed2=2
| RD2-team2= Marcel Granollers Horacio Zeballos
| RD2-score2-1=77
| RD2-score2-2=77
| RD2-score2-3=
}}

Nửa trên
D Evans N Skupski
| RD1-score03-1=3
| RD1-score03-2=6
| RD1-score03-3=[3]
| RD1-seed04=
| RD1-team04= H Hurkacz J Sinner
| RD1-score04-1=6
| RD1-score04-2=3
| RD1-score04-3=[10]

| RD1-seed05=WC
| RD1-team05= S Johnson A Krajicek
| RD1-score05-1=7
| RD1-score05-2=7
| RD1-score05-3=
| RD1-seed06=
| RD1-team06= F Auger-Aliassime M Daniell
| RD1-score06-1=5
| RD1-score06-2=5
| RD1-score06-3=

| RD1-seed07=
| RD1-team07= A Behar G Escobar
| RD1-score07-1=4
| RD1-score07-2=6
| RD1-score07-3=[10]
| RD1-seed08=8
| RD1-team08= R Klaasen B McLachlan
| RD1-score08-1=6
| RD1-score08-2=3
| RD1-score08-3=[8]

| RD1-seed11=
| RD1-team11= F Krajinović F Martin
| RD1-score11-1=1
| RD1-score11-2=6
| RD1-score11-3=[10]
| RD1-seed12=
| RD1-team12= R Bopanna I Dodig
| RD1-score12-1=6
| RD1-score12-2=4
| RD1-score12-3=[7]

| RD1-seed13=
| RD1-team13= S Gillé J Vliegen
| RD1-score13-1=4
| RD1-score13-2=63
| RD1-score13-3=
| RD1-seed14=
| RD1-team14= W Koolhof J-L Struff
| RD1-score14-1=6
| RD1-score14-2=77
| RD1-score14-3=

| RD1-seed15=
| RD1-team15= T Pütz M Venus
| RD1-score15-1=6
| RD1-score15-2=6
| RD1-score15-3=
| RD1-seed16=7
| RD1-team16= Ł Kubot M Melo
| RD1-score16-1=2
| RD1-score16-2=3
| RD1-score16-3=

| RD2-seed01=1
| RD2-team01= N Mektić M Pavić
| RD2-score01-1=79
| RD2-score01-2=5
| RD2-score01-3=[5]
| RD2-seed02=
| RD2-team02= H Hurkacz J Sinner
| RD2-score02-1=67
| RD2-score02-2=7
| RD2-score02-3=[10]

| RD2-seed03=WC
| RD2-team03= S Johnson A Krajicek
| RD2-score03-1=6
| RD2-score03-2=6
| RD2-score03-3=
| RD2-seed04=
| RD2-team04= A Behar G Escobar
| RD2-score04-1=3
| RD2-score04-2=4
| RD2-score04-3=

| RD2-seed05=3
| RD2-team05= JS Cabal R Farah
| RD2-score05-1=77
| RD2-score05-2=6
| RD2-score05-3=
| RD2-seed06=
| RD2-team06= F Krajinović F Martin
| RD2-score06-1=63
| RD2-score06-2=4
| RD2-score06-3=

| RD2-seed07=
| RD2-team07= W Koolhof J-L Struff
| RD2-score07-1=5
| RD2-score07-2=3
| RD2-score07-3=
| RD2-seed08=
| RD2-team08= T Pütz M Venus
| RD2-score08-1=7
| RD2-score08-2=6
| RD2-score08-3=

| RD3-seed01=
| RD3-team01= H Hurkacz J Sinner
| RD3-score01-1=3
| RD3-score01-2=1
| RD3-score01-3=
| RD3-seed02=WC
| RD3-team02= S Johnson A Krajicek
| RD3-score02-1=6
| RD3-score02-2=6
| RD3-score02-3=

| RD3-seed03=3
| RD3-team03= JS Cabal R Farah
| RD3-score03-1=6
| RD3-score03-2=6
| RD3-score03-3=
| RD3-seed04=
| RD3-team04= T Pütz M Venus
| RD3-score04-1=4
| RD3-score04-2=4
| RD3-score04-3=

| RD4-seed01=WC
| RD4-team01= S Johnson A Krajicek
| RD4-score01-1=77
| RD4-score01-2=68
| RD4-score01-3=[10]
| RD4-seed02=3
| RD4-team02= JS Cabal R Farah
| RD4-score02-1=65
| RD4-score02-2=710
| RD4-score02-3=[3]
}}

Nửa dưới
K Krawietz H Tecău
| RD1-score01-1=7
| RD1-score01-2=6
| RD1-score01-3=
| RD1-seed02=
| RD1-team02= F Delbonis D Schwartzman
| RD1-score02-1=5
| RD1-score02-2=3
| RD1-score02-3=

| RD1-seed03=Alt
| RD1-team03= M Arévalo F Fognini
| RD1-score03-1=7
| RD1-score03-2=65
| RD1-score03-3=[11]
| RD1-seed04=Alt
| RD1-team04= A Karatsev D Lajović
| RD1-score04-1=5
| RD1-score04-2=77
| RD1-score04-3=[9]

| RD1-seed05=
| RD1-team05= A Golubev A Mies
| RD1-score05-1=65
| RD1-score05-2=5
| RD1-score05-3=
| RD1-seed06=WC
| RD1-team06= N Monroe F Tiafoe
| RD1-score06-1=77
| RD1-score06-2=7
| RD1-score06-3=

| RD1-seed09=6
| RD1-team09= J Peers F Polášek
| RD1-score09-1=64
| RD1-score09-2=77
| RD1-score09-3=[10]
| RD1-seed10=
| RD1-team10= M Middelkoop L Saville
| RD1-score10-1=77
| RD1-score10-2=62
| RD1-score10-3=[6]

| RD1-seed11=
| RD1-team11= A Bublik C Garín
| RD1-score11-1=2
| RD1-score11-2=2
| RD1-score11-3=
| RD1-seed12=
| RD1-team12= A de Minaur C Norrie
| RD1-score12-1=6
| RD1-score12-2=6
| RD1-score12-3=

| RD1-seed13=
| RD1-team13= S Bolelli M González
| RD1-score13-1=78
| RD1-score13-2=3
| RD1-score13-3=[9]
| RD1-seed14=
| RD1-team14= K Khachanov A Rublev
| RD1-score14-1=66
| RD1-score14-2=6
| RD1-score14-3=[11]

| RD2-seed01=5
| RD2-team01= K Krawietz H Tecău
| RD2-score01-1=6
| RD2-score01-2=5
| RD2-score01-3=[7]
| RD2-seed02=Alt
| RD2-team02= M Arévalo F Fognini
| RD2-score02-1=3
| RD2-score02-2=7
| RD2-score02-3=[10]

| RD2-seed03=WC
| RD2-team03= N Monroe F Tiafoe
| RD2-score03-1=615
| RD2-score03-2=2
| RD2-score03-3=
| RD2-seed04=4
| RD2-team04= R Ram J Salisbury
| RD2-score04-1=717
| RD2-score04-2=6
| RD2-score04-3=

| RD2-seed05=6
| RD2-team05= J Peers F Polášek
| RD2-score05-1=6
| RD2-score05-2=3
| RD2-score05-3=[8]
| RD2-seed06=
| RD2-team06= A de Minaur C Norrie
| RD2-score06-1=3
| RD2-score06-2=6
| RD2-score06-3=[10]

| RD2-seed07=
| RD2-team07= K Khachanov A Rublev
| RD2-score07-1=67
| RD2-score07-2=5
| RD2-score07-3=
| RD2-seed08=2
| RD2-team08= M Granollers H Zeballos
| RD2-score08-1=79
| RD2-score08-2=7
| RD2-score08-3=

| RD3-seed01=Alt
| RD3-team01= M Arévalo F Fognini
| RD3-score01-1=6
| RD3-score01-2=77
| RD3-score01-3=
| RD3-seed02=4
| RD3-team02= R Ram J Salisbury
| RD3-score02-1=4
| RD3-score02-2=65
| RD3-score02-3=

| RD3-seed03=
| RD3-team03= A de Minaur C Norrie
| RD3-score03-1=3
| RD3-score03-2=4
| RD3-score03-3=
| RD3-seed04=2
| RD3-team04= M Granollers H Zeballos
| RD3-score04-1=6
| RD3-score04-2=6
| RD3-score04-3=

| RD4-seed01=Alt
| RD4-team01= M Arévalo F Fognini
| RD4-score01-1=3
| RD4-score01-2=4
| RD4-score01-3=
| RD4-seed02=2
| RD4-team02= M Granollers H Zeballos
| RD4-score02-1=6
| RD4-score02-2=6
| RD4-score02-3=
}}

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