Stadium: CC Round: 25 Ground: Clay
| 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 |
| Challenger - Braunschweig | 2021/07/07 09:30 | Sumit Nagal v Marvin Moeller | 3-6,6-1,2-6 |
| Challenger - Braunschweig | 2021/07/06 10:30 | Marvin Moeller v Teymuraz Gabashvili | 7-5,6-3 |
| ITF - M25 Trier | 2021/08/23 15:05 | Leopold Zima v Benito Sanchez Martinez | 6-1,7-5 |
| ITF - M25 Trier | 2021/08/23 10:30 | Leopold Zima v Lennart Melzer | 6-1,6-1 |
| ITF - M25 Ueberlingen | 2021/08/19 12:30 | Ergi Kirkin v Leopold Zima | 5-7,6-0,6-3 |
| ITF - M25 Ueberlingen | 2021/08/18 12:55 | Leopold Zima v Martin Benes | 6-2,6-1 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/09 08:50 | Dominik Fritsche v Leopold Zima | 6-3,7-5 |
| ITF - M25 Klosters | 2021/06/21 07:00 | Luca Castelnuovo v Leopold Zima | 6-2,3-6,10-6 |
| ITF - M25 Klosters | 2021/06/20 07:00 | Moritz Trocker v Leopold Zima | 2-6,2-6 |
| ITF - M15 Janov | 2021/06/17 15:50 | Johan Sebastien Tatlot v Leopold Zima | 6-0,6-2 |