Stadium: TVM Court (3) Round: 26 Ground: Hardcourt outdoor
| 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 - M25 Meerbusch | 2021/04/11 13:30 | Kai Wehnelt v Gian Luca Tanner | 6-3,4-6,2-10 |
| ITF - M25 Biel | 2021/03/29 07:55 | Kilian Feldbausch v Kai Wehnelt | 3-6,6-1,11-9 |
| ITF - M15 Monastir | 2021/03/12 08:30 | Kai Wehnelt v Luca Giacomini | 4-6,4-6 |
| ITF - M15 Troisdorf | 2021/05/11 11:45 | Max Hans Rehberg v Lucas Gerch | 0-6,6-4,0-6 |
| ITF - M15 Antalya | 2021/05/06 08:50 | Lucas Gerch v Sandro Ehrat | 4-6,2-6 |
| ITF - M15 Antalya | 2021/05/05 12:25 | Gerald Melzer v Lucas Gerch | 6-7,6-4,4-6 |
| ITF - M25 Meerbusch | 2021/04/13 15:05 | Lucas Gerch v Sandro Ehrat | 3-6,4-6 |
| Challenger - Marbella | 2021/03/28 10:00 | Lucas Gerch v Timofey Skatov | 5-7,5-7 |
| ITF - M25 Vale Do Lobo | 2021/03/10 15:00 | Pedro Araujo v Lucas Gerch | 2-6,6-1,6-4 |
| ITF - M25 Faro | 2021/03/03 09:30 | Dan Added v Lucas Gerch | 6-3,6-3 |
| ITF - M25 Vale Do Lobo | 2021/02/25 10:30 | Lucas Gerch v Antoine Escoffier | 3-6,1-6 |