Stadium: Hard Court Central Round: 25 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/06/02 10:55 | Marvin Moeller v Antonio Cayetano March | 3-6,6-7 |
| ITF M15 Sibenik | 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 Trimbach | 2021/03/11 12:00 | Dominic Stephan Stricker v Marvin Moeller | 6-1,6-4 |
| ITF M25 Trimbach | 2021/03/10 09:00 | Patrik Hartmeier v Marvin Moeller | 1-6,7-6,2-6 |
| ITF M15 Heraklion | 2021/06/08 06:30 | Edoardo Graziani v William Griffith | 6-1,4-6,4-10 |
| ITF M15 Heraklion | 2021/06/07 07:30 | Austin Ansari v William Griffith | 1-6,1-6 |
| ITF M15 Heraklion | 2021/06/06 11:00 | Floris Podzimek v William Griffith | 1-6,1-6 |
| ITF M15 Heraklion | 2021/06/02 11:20 | William Griffith v Federico Arnaboldi | 3-6,7-6,3-6 |
| ITF M15 Heraklion | 2021/06/01 06:30 | Austin Ansari v William Griffith | 1-6,0-6 |
| ITF M15 Heraklion | 2021/05/31 06:30 | Eduardo Cohen v William Griffith | 1-6,1-6 |
| ITF M15 Heraklion | 2021/05/30 09:00 | Markus Wunder v William Griffith | 4-6,2-6 |
| ITF M15 Heraklion | 2021/05/26 08:50 | William Griffith v Yuki Mochizuki | 4-6,4-6 |