| UTR Pro Tennis Series - Amsterdam | 2021/12/11 08:30 | Yan Sabanin v Rik Muller | 4-6,4-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/10 10:00 | Rik Muller v Aloys J W Van Baal | 6-7,4-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/09 07:00 | Rik Muller v Max Houkes | 1-6,3-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/06 10:30 | Amadatus Admiraal v Rik Muller | 7-6,5-2 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/05 09:00 | Edison Ambarzumjan v Rik Muller | 2-6,6-2,0-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/04 10:30 | Ivan Denisov v Rik Muller | 6-3,5-1 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/03 10:30 | Michiel de Krom v Rik Muller | 6-4,5-1 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/01 09:00 | Deney Wassermann v Rik Muller | 6-0,5-2 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/11 07:00 | Max Van Nunen v Zachary Eisinga | 6-4,1-6,4-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/10 07:00 | Tim Sandkaulen v Zachary Eisinga | 6-1,6-7,7-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/09 08:30 | Tibo Colson v Zachary Eisinga | 6-2,6-3 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/07 07:00 | Sem Verbeek v Zachary Eisinga | 6-0,6-1 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/06 11:30 | Zachary Eisinga v Jurriaan Bol | 2-6,6-4,6-1 |
| ITF - M15 Sharm El Sheikh | 2021/11/08 11:30 | Zachary Eisinga v Louis Allen | 5-7,7-5,8-10 |
| ITF - M15 Sharm El Sheikh | 2021/11/07 17:00 | Zachary Eisinga v Danyil Chornous | 6-1,6-2 |
| ITF - M15 Sharm El Sheikh | 2021/11/03 11:30 | Zachary Eisinga v Mason Recci | 4-6,4-6 |