Stadium: Court 8 Round: 26 Ground: Clay
| DTB German Pro Series | 2020/06/12 11:05 | Peter Heller v Kai Wehnelt | 6-4,6-4 |
| ITF M25 Nussloch | 2019/01/24 13:45 | Peter Heller v Kai Wehnelt | 6-4,6-1 |
| ITF Kuwait F1 | 2018/11/02 07:00 | Peter Heller v Kai Wehnelt | 4-6,6-2,7-5 |
| ITF Czech Republic F2 | 2018/05/23 12:20 | Kai Wehnelt v Peter Heller | 1-6,3-6 |
| ITF M25 Kramsach | 2023/07/26 12:20 | Kai Wehnelt v Manuel Plunger | 6-3,3-6,6-2 |
| ITF M25 Telfs | 2023/07/20 08:55 | Alex Barrena v Kai Wehnelt | 6-3,6-1 |
| ITF M25 Telfs | 2023/07/19 10:00 | Kai Wehnelt v Petro Orlando Fellin | 6-3,6-1 |
| ITF M25 Esch/Alzette | 2023/07/14 10:00 | Alexander Blockx v Kai Wehnelt | 3-6,7-5,6-1 |
| ITF M25 Esch/Alzette | 2023/07/13 10:00 | Kai Wehnelt v Alex Knaff | 6-7,7-6,7-6 |
| ITF M25 Esch/Alzette | 2023/07/12 09:45 | Stijn Slump v Kai Wehnelt | 1-6,6-3,3-6 |
| ITF M25 The Hague | 2023/07/05 14:05 | Kai Wehnelt v Sander Jong | 1-6,2-6 |
| Challenger Poznan | 2023/06/19 09:00 | Rudolf Molleker v Kai Wehnelt | 6-4,6-4 |
| ITF M25 Kramsach | 2023/07/26 10:00 | Peter Heller v Alex Barrena | 6-3,3-6,6-1 |
| ITF M25 Telfs | 2023/07/22 08:00 | Peter Heller v Buvaysar Gadamauri | 6-2,1-6,4-6 |
| ITF M25 Telfs | 2023/07/21 12:00 | Peter Heller v Daniel Siniakov | 6-1,6-0 |
| ITF M25 Telfs | 2023/07/20 09:45 | Peter Heller v Ondrej Horak | 6-1,6-1 |
| ITF M25 Telfs | 2023/07/18 10:00 | Peter Heller v Niklas Schell | 6-3,6-1 |
| ITF M15 Antalya | 2023/04/21 07:30 | Viacheslav Bielinskyi v Peter Heller | 6-7,6-0,6-3 |
| ITF M15 Antalya | 2023/04/20 07:00 | Atakan Karahan v Peter Heller | 1-6,0-6 |
| ITF M15 Antalya | 2023/04/19 07:00 | Marsel Ilhan v Peter Heller | 5-7,1-6 |