Stadium: Court 4 Round: 26 Ground: Clay
| ATP Acapulco MD | 2021/03/18 00:00 | Herbert/Mahut v Klaasen/Mclachlan | 6-4,6-4 |
| ATP Madrid MD | 2021/05/05 14:25 | Klaasen/Mclachlan v Fritz/Marach | 6-2,6-3 |
| ATP Estoril MD | 2021/04/30 11:00 | Nys/Puetz v Klaasen/Mclachlan | 3-6,6-4,14-12 |
| ATP Estoril MD | 2021/04/29 10:30 | Monroe/Tiafoe v Klaasen/Mclachlan | 3-6,7-6,6-10 |
| ATP Estoril MD | 2021/04/28 11:00 | Bolelli/Gonzalez v Klaasen/Mclachlan | 2-6,3-6 |
| ATP Belgrade MD | 2021/04/20 15:25 | Sabanov/Sabanov v Klaasen/Mclachlan | 6-4,6-2 |
| ATP Monte Carlo MD | 2021/04/16 15:15 | Evans/Skupski v Klaasen/Mclachlan | 1-6,7-6,10-4 |
| ATP Monte Carlo MD | 2021/04/14 15:15 | Klaasen/Mclachlan v Ram/Salisbury | 6-7,6-3,10-5 |
| ATP Monte Carlo MD | 2021/04/13 11:00 | De Minaur/Peers v Klaasen/Mclachlan | 6-7,6-3,9-11 |
| ATP Madrid MD | 2021/05/05 09:00 | Chardy/Martin v Herbert/Mahut | 3-6,3-6 |
| ATP Barcelona MD | 2021/04/21 17:45 | Cabal/Farah v Herbert/Mahut | 6-2,6-4 |
| ATP Monte Carlo MD | 2021/04/16 10:15 | Herbert/Mahut v Mektic/Pavic | 3-6,1-6 |
| ATP Monte Carlo MD | 2021/04/14 14:55 | Herbert/Mahut v Kontinen/Roger-Vasselin | 7-6,7-5 |
| ATP Monte Carlo MD | 2021/04/13 12:20 | Herbert/Mahut v Bolelli/Sinner | 6-4,6-4 |
| ATP Miami MD | 2021/03/28 17:30 | Herbert/Mahut v Kecmanovic/Qureshi | 6-4,4-6,3-10 |
| ATP Miami MD | 2021/03/27 21:15 | Herbert/Mahut v Bopanna/Paire | 6-3,6-2 |
| ATP Acapulco MD | 2021/03/20 00:00 | Granollers/Zeballos v Herbert/Mahut | 6-3,7-6 |