| date | time C | Pair 1 | sets | Pair 2 | set 1 | set 2 | set 3 | dur | 
| Mon 26.07.21 | 17:56 4 | Nikola Mektic / Mate Pavic |  CRO |  CRO | 1 | 2-1 | L Lorenzo / Lorenzo Sonego |  ITA |  ITA |   | 7-5 | 6-75 | [10-7] | 2:04 (93-84) | 
| Mon 26.07.21 | 14:31 7 | Ben Mclachlan / Kei Nishikori |  JPN |  JPN |   | 2-0 | Jamie Murray / Neal Skupski |  GBR |  GBR | 7 | 6-3 | 6-4 |   | 1:20 (62-48) | 
| Tue 27.07.21 | 12:11 6 | Austin Krajicek / Tennys Sandgren |  USA |  USA |   | 2-1 | L Klein / Filip Polasek |  SVK |  SVK |   | 6-72 | 6-2 | [10-5] | 1:28 (76-63) | 
| Tue 27.07.21 | 19:03 4 | Jan-Lennard Struff / Alexander Zverev |  GER |  GER |   | 2-0 | Jeremy Chardy / Gael Monfils |  FRA |  FRA |   | 6-4 | 7-5 |   | 1:18 (73-57) | 
| Mon 26.07.21 | 14:12 8 | Marcus Daniell / Michael Venus |  NZL |  NZL |   | w/o | Wesley Koolhof / Jean-Julien Rojer |  NED |  NED | 8 |  walk over | 
| Mon 26.07.21 | 16:16 7 | Juan Sebastian Cabal / Robert Farah |  COL |  COL | 3 | 2-0 | Oliver Marach / Philipp Oswald |  AUT |  AUT |   | 6-4 | 6-1 |   | 1:25 (66-49) | 
| Tue 27.07.21 | 17:11 3 | Marin Cilic / Ivan Dodig |  CRO |  CRO |   | 2-0 | Rajeev Ram / Frances Tiafoe |  USA |  USA |   | 6-3 | 7-5 |   | 1:31 (72-61) | 
| Tue 27.07.21 | 12:15 7 | Andy Murray / Joe Salisbury |  GBR |  GBR |   | 2-0 | Kevin Krawietz / Tim Puetz |  GER |  GER |   | 6-2 | 7-62 |   | 1:42 (-----) | 
| date | time C | Pair 1 | sets | Pair 2 | set 1 | set 2 | set 3 | dur (points) | 
| Sat 24.07.21 | 18:03 10 | Nikola Mektic / Mate Pavic |  CRO |  CRO | 1 | 2-0 | Marcelo Demoliner / Marcelo Melo |  BRA |  BRA |   | 7-66 | 6-4 |   | 1:37 (76-70) | 
| Sun 25.07.21 | 17:48 8 | Lorenzo Musetti / Lorenzo Sonego |  ITA |  ITA |   | 2-0 | Pablo Andujar / Roberto Carballes Baena |  ESP |  ESP |   | 7-5 | 6-4 |   | 1:37 (78-66) | 
| Sat 24.07.21 | 15:22 5 | Ben Mclachlan / Kei Nishikori |  JPN |  JPN | HCP | 2-0 | Pedro Sousa / Joao Sousa |  POR |  POR |   | 6-1 | 6-4 |   | 0:58 (58-39) | 
| Sat 24.07.21 | 15:54 5 | Jamie Murray / Neal Skupski |  GBR |  GBR | 7 | 2-1 | Andres Molteni / Horacio Zeballos |  ARG |  ARG |   | 6-73 | 6-4 | 13-11 | 1:02 (80-84) | 
| Sun 25.07.21 | 16:02 9 | Lukas Klein / Filip Polasek |  SVK |  SVK |   | 2-0 | Aslan Karatsev / Daniil Medvedev |  RUS |  RUS |   | 7-5 | 6-4 |   | 1:22 (64-59) | 
| Sun 25.07.21 | 18:35 5 | Austin Krajicek / Tennys Sandgren |  USA |  USA |   | 2-1 | John Peers / Max Purcell |  AUS |  AUS |   | 3-6 | 7-65 | 10-5 | 1:28 (70-77)  | 
| Sat 24.07.21 | 17:56 11 | Jeremy Chardy / Gael Monfils |  FRA |  FRA |   | 2-1 | Alexander Bublik / Anfrey Golubev |  RUS |  KAZ |   | 6-74 | 7-63 | 10-7 | 2:03 (102-94) | 
| Sat 24.07.21 | 17:15 6 | Jan-Lennard Struff / Alexander Zverev |  GER |  GER |   | 2-0 | Hubert Hurkacz / Lukasz Kubot |  POL |  POL | 5 | 6-2 | 7-65 |   | 1:31 (77-64) | 
| Sat 24.07.21 | 11:17 11 | Wesley Koolhof / Jean-Julien Rojer |  NED |  NED | 8 | 2-0 | Sander Gille / Joran Vliegen |  BEL |  BEL |   | 6-3 | 7-65 |   | 1:53 (78-65) | 
| Sun 25.07.21 | 18:30 7 | Marcus Daniell / Michael Venus |  NZL |  NZL |   | 2-0 | Egor Gerasimov / Ilya Ivashka |  BLR |  BLR |   | 6-3 | 7-66 |   | 1:17 (72-54) | 
| Sun 25.07.21 | 18:12 10 | Oliver Marach / Philipp Oswald |  AUT |  AUT |   | 2-0 | John Millman / Luke Saville |  AUS |  AUS |   | 7-5 | 6-2 |   | 1:19 (68-49) | 
| Sun 25.07.21 | 14:32 10 | Juan Sebastian Cabal / Robert Farah |  COL |  COL | 3 | 2-0 | Pablo Carreno Busta / Alexandro Davidovich Fokina |  ESP |  ESP |   | 6-2 | 6-4 |   | 1:19 (60-46) | 
| Sat 24.07.21 | 15:37 10 | Rajeev Ram / Frances Tiafoe |  USA |  USA |   | 2-1 | Karen Khachanov / Andrey Rublev |  RUS |  RUS | 6 | 6-73 | 7-65 | 12-10 | 2:05 (98-96) | 
| Sun 25.07.21 | 17:07 5 | Marin Cilic / Ivan Dodig |  CRO |  CRO |   | 2-0 | Taro Daniel / Yoshihito Nishioka |  JPN |  JPN |   | 6-2 | 6-4 |   | 1:09 (64-41) | 
| Sat 24.07.21 | 11:12 5 | Kevin Krawietz / Tim Puetz |  GER |  GER |   | 2-0 | Facundo Bagnis / Diego Schwartzman |  ARG |  ARG |   | 6-2 | 6-1 |   | 1:00 (57-33) | 
| Sat 24.07.21 | 12:35 11 | Andy Murray / Joe Salisbury |  GBR |  GBR |   | 2-0 | Pierre-Hugues Herbert / Nicolas Mahut |  FRA |  FRA | 2 | 6-3 | 6-2 |   | 1:15 (59-41) |