Stadium: Court 6 Round: 25 Ground: Clay
| ITF M25 Alkmaar | 2021/06/21 16:00 | Kai Wehnelt v Deney Wassermann | 5-7,6-3,12-10 |
| ITF M15 Bucharest | 2021/05/26 08:30 | Kai Wehnelt v Cristian Rodriguez | 6-7,3-6 |
| ITF M15 Troisdorf | 2021/05/13 09:00 | Kai Wehnelt v Lucas Gerch | 4-6,6-4,5-7 |
| ITF M15 Troisdorf | 2021/05/11 12:35 | Tomas Lipovsek Puches v Kai Wehnelt | 1-6,7-6,3-6 |
| ITF M15 Cairo | 2021/05/06 07:50 | Jose Fco. Vidal Azorin v Kai Wehnelt | 6-4,6-3 |
| ITF M15 Cairo | 2021/05/05 09:45 | Hanwen Li v Kai Wehnelt | 3-6,4-6 |
| ITF M15 Cairo | 2021/04/28 08:00 | Kai Wehnelt v Juan Ignacio Galarza | 6-7,6-4,6-7 |
| ITF M15 Cairo | 2021/04/21 14:45 | Juan Ignacio Galarza v Kai Wehnelt | 6-3,6-3 |
| ITF M15 Alkmaar | 2020/08/24 08:00 | Martin Van Der Meerschen v Sander Jong | 6-3,7-6 |
| ITF M15 Alkmaar | 2020/08/23 08:00 | Sander Jong v Maxime Pauwels | 2-6,6-4,10-8 |