Stadium: Center Court Round: 27 Ground: Clay
| ITF Germany F16 | 2016/10/26 09:00 | Mick Veldheer v Marvin Moeller | 1-6,4-6 |
| ITF M25 Trier | 2021/08/26 15:00 | Marvin Moeller v Marlon Vankan | 6-2,7-5 |
| ITF M25 Trier | 2021/08/25 09:00 | Marvin Moeller v Leopold Zima | 6-1,7-5 |
| Challenger Luedenscheid | 2021/08/17 15:35 | Matteo Martineau v Marvin Moeller | 6-0,6-2 |
| Challenger Meerbusch | 2021/08/09 09:30 | Jesper De Jong v Marvin Moeller | 6-1,6-4 |
| Challenger Meerbusch | 2021/08/08 09:10 | Marvin Moeller v Benjamin Hassan | 5-7,7-5,6-3 |
| ITF M25 Wetzlar | 2021/08/04 08:00 | Marvin Moeller v Peter Heller | 2-6,3-6 |
| Challenger Braunschweig | 2021/07/10 09:00 | Daniel Altmaier v Marvin Moeller | 7-5,6-0 |
| Challenger Braunschweig | 2021/07/08 13:00 | Marvin Moeller v Benjamin Hassan | 6-4,6-2 |
| ITF M25 Trier | 2021/08/26 09:30 | Aliaksandr Bulitski v Mick Veldheer | 3-6,3-6 |
| ITF M25 Trier | 2021/08/24 10:00 | Matthew Romios v Mick Veldheer | 1-6,0-6 |
| ITF M25 Frankfurt am Main | 2021/08/12 09:00 | Mick Veldheer v Oriol Roca Batalla | 4-6,6-2,4-6 |
| ITF M15 Frederiksberg | 2021/08/06 12:40 | Mick Veldheer v August Holmgren | 4-6,4-6 |
| ITF M15 Frederiksberg | 2021/08/05 10:00 | Mick Veldheer v Palaphoom Kovapitukted | 0-6,6-3,6-3 |
| ITF M15 Frederiksberg | 2021/08/04 11:05 | Mick Veldheer v Philip Hjorth | 6-3,6-3 |
| ITF M15 Vejle | 2021/07/29 16:30 | Guy Den Ouden v Mick Veldheer | 6-4,6-0 |
| ITF M15 Vejle | 2021/07/28 12:45 | Gabriel Decamps v Mick Veldheer | 3-6,1-6 |