Stadium: Court 10 Round: 24 Ground: Hardcourt outdoor
| ATP - Winston-Salem - Dublu Masculin | 2021/08/24 01:20 | Klaasen/Mclachlan v Daniell/Demoliner | 3-6,6-4,4-10 |
| ATP - Cincinnati - Dublu Masculin | 2021/08/16 17:30 | Behar/Escobar v Klaasen/Mclachlan | 4-6,6-3,10-8 |
| ATP - Toronto - Dublu Masculin | 2021/08/11 19:40 | Klaasen/Mclachlan v Koolhof/Krajicek | 4-6,6-7 |
| ATP - Washington - Dublu Masculin | 2021/08/08 18:00 | Klaasen/Mclachlan v Skupski/Venus | 7-6,6-4 |
| ATP - Washington - Dublu Masculin | 2021/08/07 19:00 | Daniell/Melo v Klaasen/Mclachlan | 4-6,5-7 |
| ATP - Washington - Dublu Masculin | 2021/08/03 23:10 | Klaasen/Mclachlan v Bublik/Golubev | 7-5,6-2 |
| Wimbledon - Dublu Masculin | 2021/07/07 10:00 | Bolelli/Gonzalez v Klaasen/Mclachlan | 7-6,6-4,6-3 |
| Wimbledon - Dublu Masculin | 2021/07/05 10:00 | Klaasen/Mclachlan v Chardy/Martin | 6-7,6-4,6-7,7-6,7-5 |