Stadium: Court Cascais Round: 28 Ground: Clay
| ATP Estoril MD | 2021/04/28 12:20 | Nys/Puetz v Demoliner/Gonzalez | 7-6,6-1 |
| ATP Estoril MD | 2021/04/27 13:00 | Nys/Puetz v Murray/Glasspool | 6-3,6-3 |
| ATP Estoril MD | 2021/04/27 13:00 | Nys/Puetz v Murray/Glasspool | 6-3,6-3 |
| ATP Marbella MD | 2021/04/10 12:30 | Nys/Puetz v Behar/Escobar | 4-6,6-7 |
| ATP Marbella MD | 2021/04/08 13:30 | Marrero/Menendez-Maceiras v Nys/Puetz | 4-6,0-6 |
| ATP Marbella MD | 2021/04/06 12:15 | Nys/Puetz v Carballes Baena/Ramos-Vinolas | 4-6,6-3,10-7 |
| Challenger Biella MD | 2021/02/20 14:45 | Nys/Puetz v Glasspool/Heliovaara | 7-6,6-3 |
| Challenger Biella MD | 2021/02/18 12:30 | Nys/Puetz v Arneodo/Olivetti | 6-2,6-4 |
| 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 Miami MD | 2021/03/27 19:45 | Klaasen/Mclachlan v Demoliner/Gonzalez | 3-6,4-6 |
| ATP Acapulco MD | 2021/03/18 00:00 | Herbert/Mahut v Klaasen/Mclachlan | 6-4,6-4 |