| Challenger Potchefstroom MD | 2021/02/20 08:00 | Klaasen R / Roelofse R v Cagnina/Kolar | 6-4,6-4 |
| Challenger Potchefstroom MD | 2021/02/18 11:50 | Klaasen R / Roelofse R v Gabashvili/Vervoort | 6-3,4-6,12-10 |
| Challenger Potchefstroom MD | 2021/02/17 12:50 | Klaasen R / Roelofse R v Kopriva V / Safranek V | 7-6,4-6,10-4 |
| Challenger Potchefstroom MD | 2021/02/12 13:55 | Klaasen R / Roelofse R v Polansky P / Schnur B | 3-6,4-6 |
| Challenger Potchefstroom MD | 2021/02/11 11:30 | Klaasen R / Roelofse R v Cagnina/Kuhn | 6-1,7-5 |
| Challenger Potchefstroom MD | 2021/02/10 11:30 | Klaasen R / Roelofse R v Caripi V / Hunter V | 6-3,6-2 |
| Coupe Davis | 2020/03/07 12:00 | Basic M / Brkic T v Klaasen R / Roelofse R | 7-6,6-3 |
| ATP Cup, Playoffs | 2020/01/08 13:05 | Mahut/Roger-Vasselin v Klaasen R / Roelofse R | 3-6,4-6 |
| Coupe Davis | 2021/09/19 14:45 | Harris/Klaasen v Badra/Martinez | 6-2,6-4 |