| UTR Pro Tennis Series Amsterdam | 2021/12/06 07:00 | Jip Van Assendelft v Michiel de Krom | 2-6,6-2,1-6 |
| UTR Pro Tennis Series Barcelona | 2021/11/28 09:30 | Michiel de Krom v Vlad Cristian Breazu | 6-1,4-6,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/11/27 11:00 | Michiel de Krom v Alvaro Bueno Gil | 6-4,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/11/26 09:30 | Michiel de Krom v Volodymyr Uzhylovskyi | 6-0,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/11/25 14:30 | Michiel de Krom v Thomas Laurent | 3-6,3-5 |
| UTR Pro Tennis Series Barcelona | 2021/11/25 08:00 | Michiel de Krom v Euan Mcintosh | 6-0,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/11/22 09:30 | Michiel de Krom v Sergio Redondo | 6-3,5-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 13:30 | Maxence Broville v Michiel de Krom | 6-4,5-2 |