| UTR Pro Tennis Series Amsterdam | 2021/11/06 13:30 | Maxence Broville v Michiel de Krom | 6-4,5-2 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 12:00 | Michiel de Krom v Deney Wassermann | 2-6,3-6 |
| 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 | 2021/11/02 10:30 | Michiel de Krom v Edison Ambarzumjan | 6-1,6-1 |
| UTR Pro Tennis Series Amsterdam | 2021/11/01 09:00 | Ivan Denisov v Michiel de Krom | 3-6,3-5 |
| ITF M15 Almada | 2021/07/07 08:30 | Michiel de Krom v Duarte Vale | 3-6,3-6 |
| ITF M25 The Hague | 2021/06/28 08:45 | Carlos Lopez Montagud v Michiel de Krom | 6-1,6-3 |
| ITF M25 The Hague | 2021/06/27 08:00 | Tom Clavel v Michiel de Krom | 3-6,5-7 |
| UTR Pro Tennis Series Barcelona | 2021/11/13 10:00 | Sergio Redondo v Danylo Veremeychuk | 2-6,3-6 |
| UTR Pro Tennis Series Barcelona | 2021/11/11 18:30 | Diego F Flores v Sergio Redondo | 6-2,5-1 |
| UTR Pro Tennis Series Barcelona | 2021/11/09 12:30 | Xavier Gabarro v Sergio Redondo | 2-6,3-5 |