| UTR Pro Tennis Series Amsterdam | 2021/12/12 08:30 | Guy Den Heijer v Max Houkes | 6-3,1-6,6-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/11 10:00 | Tibo Colson v Max Houkes | 4-6,2-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/10 10:00 | Roland Stuurman v Max Houkes | 2-6,1-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/09 07:00 | Rik Muller v Max Houkes | 1-6,3-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/07 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 Monastir | 2021/12/01 08:30 | Matas Vasiliauskas v Guy Den Ouden | 6-3,6-4 |
| ITF M15 Monastir | 2021/11/28 09:00 | Guy Den Ouden v Gabriel Decamps | 6-3,6-4 |
| ITF M15 Monastir | 2021/11/27 10:25 | Martyn Pawelski v Guy Den Ouden | 4-6,2-6 |
| ITF M15 Monastir | 2021/11/26 11:35 | Guy Den Ouden v Terence Atmane | 6-7,7-5,6-1 |
| ITF M15 Monastir | 2021/11/25 08:25 | Guy Den Ouden v Omar Brigida | 6-2,6-7,6-4 |
| ITF M15 Monastir | 2021/11/23 13:25 | Guy Den Ouden v Josef Southcombe | 6-3,6-1 |
| ITF M15 Monastir | 2021/11/11 08:00 | Guy Den Ouden v Pierre Yves Bailly | 3-6,6-7 |
| ITF M15 Monastir | 2021/11/09 12:00 | Guy Den Ouden v Zakai Stone | 6-3,6-4 |