Stadium: Court 5 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/09/16 07:00 | Kai Wehnelt v Joshua Paris | 6-2,6-4 |
| ITF M15 Sozopol | 2021/09/14 09:00 | Kai Wehnelt v Zura Tkemaladze | 6-2,6-2 |
| ITF M25 Eupen | 2021/09/08 07:30 | Guy Den Heijer v Kai Wehnelt | 3-6,6-3,6-2 |
| ITF M25 Trier | 2021/08/26 11:00 | Quentin Folliot v Kai Wehnelt | 7-5,4-6,7-5 |
| ITF M25 Trier | 2021/08/24 13:30 | Kai Wehnelt v Sarp Agabigun | 6-0,6-4 |
| ITF M15 Oldenzaal | 2021/08/18 14:30 | Kai Wehnelt v Daniel De Jonge | 5-7,6-1,6-7 |
| ITF M25 Frankfurt am Main | 2021/08/11 15:30 | Kai Wehnelt v Lucas Gerch | 6-3,2-6,4-6 |
| ITF M25 Wetzlar | 2021/08/04 08:00 | Harold Mayot v Kai Wehnelt | 6-4,6-7,7-5 |
| ITF M15 Sozopol | 2021/09/16 07:00 | Aleksandre Bakshi v Calin Manda | 1-6,2-6 |
| ITF M15 Sozopol | 2021/09/15 07:00 | Martin Dimitrov v Calin Manda | 4-6,4-6 |
| ITF M15 Curtea de Arges | 2021/08/13 10:55 | Calin Manda v Matias Zukas | 0-6,7-5,1-6 |
| ITF M15 Curtea de Arges | 2021/08/12 09:00 | Gabi Adrian Boitan v Calin Manda | 3-6,2-6 |
| ITF M15 Curtea de Arges | 2021/08/11 11:50 | Calin Manda v Alex Barrena | 6-4,6-2 |
| ITF M15 Curtea de Arges | 2021/08/10 08:25 | Calin Manda v Facundo Arias Bisso | 6-0,6-2 |
| ITF M15 Curtea de Arges | 2021/08/09 09:00 | Calin Manda v Vladimir Filip | 6-2,6-4 |
| ITF M25 Pitesti | 2021/08/04 06:00 | Calin Manda v Hernan Casanova | 1-6,2-6 |