Stadium: Court 8 Round: 54 Ground: Clay
| ITF M25 - Alkmaar | 2021/06/20 11:00 | Marvin Moeller v Max Wiskandt | 7-6,6-3 |
| ITF - M15 Heraklion | 2021/06/09 11:45 | Marvin Moeller v William Griffith | 4-6,4-6 |
| ITF - M15 Heraklion | 2021/06/02 10:55 | Marvin Moeller v Antonio Cayetano March | 3-6,6-7 |
| ITF M15 - Šibenik | 2021/04/20 11:05 | Marvin Moeller v Sean Cuenin | 6-2,6-7,2-6 |
| ITF M25 - Meerbusch | 2021/04/13 13:30 | Tak Khunn Wang v Marvin Moeller | 6-4,6-3 |
| ITF M25 - Biel | 2021/03/29 12:05 | Yann Marti v Marvin Moeller | 6-4,6-7,10-5 |
| ITF - M15 Poitiers | 2021/03/19 13:10 | Kyrian Jacquet v Marvin Moeller | 6-2,6-3 |
| ITF - M15 Poitiers | 2021/03/17 10:30 | Marvin Moeller v Jean-Jacques Rakotohasy | 6-2,6-1 |
| ITF M25 - Alkmaar | 2021/06/20 17:00 | Constantin Bittoun Kouzmine v Michiel de Krom | 3-6,3-6 |
| ITF M15 - Valldoreix | 2021/05/09 14:00 | Michiel de Krom v Federico Iannaccone | 3-6,2-6 |
| ITF M15 - Majadahonda | 2021/05/05 06:55 | Martin Cuevas v Michiel de Krom | 7-5,6-3 |
| ITF M25 - Reus | 2021/04/13 10:00 | Yan Bondarevskiy v Michiel de Krom | 6-3,6-3 |
| ITF M25 - Reus | 2021/04/12 07:30 | Jose Joaquin M Cisneros v Michiel de Krom | 0-6,6-4,10-12 |
| ITF M25 - Reus | 2021/04/11 11:00 | Ivan Bas Mengual v Michiel de Krom | 1-6,5-7 |
| ITF M15 - Alkmaar | 2020/08/23 11:00 | Buvaysar Gadamauri v Michiel de Krom | 6-3,6-2 |
| ITF M15 - Haren | 2019/08/28 12:40 | Michiel de Krom v Jesper De Jong | 6-7,6-2,3-6 |