Stadium: CC Round: 25 Ground: Clay
| 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 Wroclaw | 2021/06/28 09:30 | Marvin Moeller v Matej Galik | 6-3,6-7,11-13 |
| ITF M25 Wroclaw | 2021/06/27 11:00 | Marvin Moeller v Jasza Szajrych | 6-2,6-1 |
| ITF M25 Alkmaar | 2021/06/25 11:30 | Nicolas Alvarez Varona v Marvin Moeller | 6-1,6-4 |
| ITF M25 Alkmaar | 2021/06/24 09:00 | Deney Wassermann v Marvin Moeller | 6-7,7-6,3-6 |
| 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 Genova | 2021/06/17 15:50 | Johan Sebastien Tatlot v Leopold Zima | 6-0,6-2 |
| ITF M15 Genova | 2021/06/16 17:45 | Alessandro Ceppellini v Leopold Zima | 6-4,3-6,2-6 |
| ITF M15 Genova | 2021/06/15 08:55 | Mirko Martinez v Leopold Zima | 5-7,4-6 |
| ITF M15 Genova | 2021/06/14 07:00 | Leopold Zima v Nicolo Turchetti | 6-1,4-6,10-7 |
| ITF M15 Troisdorf | 2021/05/10 11:00 | Leopold Zima v Yannik Steinegger | 2-6,6-7 |
| ITF M15 Troisdorf | 2021/05/09 13:00 | Leopold Zima v Julien De Cuyper | 6-4,6-4 |