| 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 | 2021/12/07 07:00 | Christian Hansen v Max Houkes | 6-1,3-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/06 08:30 | Max Houkes v Jesse De Jager | 4-6,6-2,6-3 |
| ITF M15 Heraklion | 2021/11/16 07:00 | Max Houkes v Kai Lemstra | 4-6,6-7 |
| ITF M15 Heraklion | 2021/11/15 08:00 | Max Houkes v Nikolas Moceanu | 6-0,6-4 |
| ITF M15 Heraklion | 2021/11/14 07:00 | Max Houkes v Stephanos Schinas | 6-2,6-4 |
| ITF M15 Heraklion | 2021/11/10 07:00 | Guy Den Heijer v Max Houkes | 7-6,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/07 12:00 | Max Houkes v Amadatus Admiraal | 6-0,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 10:30 | Max Houkes v Miko Wassermann | 6-4,6-3 |