stadio: Court 1 Round: 28 Ground: Clay
| ATP Estoril DM | 2021/04/28 11:00 | Bolelli/Gonzalez v Klaasen/Mclachlan | 2-6,3-6 |
| ATP Santiago DM | 2021/03/12 15:00 | Klaasen/Mclachlan v Bolelli/Gonzalez | 4-6,4-6 |
| ATP Ginevra DM | 2021/05/20 12:15 | Brkic/Cacic v Bolelli/Gonzalez | 3-6,6-7 |
| ATP Ginevra DM | 2021/05/17 10:15 | Purcell/Saville v Bolelli/Gonzalez | 6-7,6-7 |
| ATP Estoril DM | 2021/04/28 11:00 | Bolelli/Gonzalez v Klaasen/Mclachlan | 2-6,3-6 |
| ATP Belgrado DM | 2021/04/22 10:00 | Brkic/Cacic v Bolelli/Gonzalez | 0-6,7-6,10-8 |
| ATP Belgrado DM | 2021/04/21 14:45 | Kecmanovic/Lajovic v Bolelli/Gonzalez | 4-6,4-6 |
| ATP Santiago DM | 2021/03/14 16:45 | Bolelli/Gonzalez v Delbonis/Munar | 7-6,6-4 |
| ATP Santiago DM | 2021/03/12 15:00 | Klaasen/Mclachlan v Bolelli/Gonzalez | 4-6,4-6 |
| ATP Santiago DM | 2021/03/11 18:40 | Bolelli/Gonzalez v Arneodo/Paire | 6-2,7-6 |
| ATP Ginevra DM | 2021/05/20 11:50 | Klaasen/Mclachlan v Cilic/Golubev | 6-3,7-6 |
| ATP Ginevra DM | 2021/05/18 14:10 | Klaasen/Mclachlan v Bambridge/Inglot | 6-3,7-6 |
| ATP Roma DM | 2021/05/13 15:40 | Klaasen/Mclachlan v Ram/Salisbury | 3-6,2-6 |
| ATP Roma DM | 2021/05/12 15:15 | Gonzalez/Martin v Klaasen/Mclachlan | 7-6,4-6,6-10 |
| ATP Madrid DM | 2021/05/06 14:35 | Klaasen/Mclachlan v Herbert/Mahut | 6-7,6-7 |
| ATP Madrid DM | 2021/05/05 14:25 | Klaasen/Mclachlan v Fritz/Marach | 6-2,6-3 |
| ATP Estoril DM | 2021/04/30 11:00 | Nys/Puetz v Klaasen/Mclachlan | 3-6,6-4,14-12 |
| ATP Estoril DM | 2021/04/29 10:30 | Monroe/Tiafoe v Klaasen/Mclachlan | 3-6,7-6,6-10 |