Stadium: Center Court Neuss Round: 1
| 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 |
| DTB German Pro Series | 2020/06/11 08:00 | Benito Sanchez Martinez v Peter Heller | 4-6,2-6 |
| DTB German Pro Series | 2020/06/10 12:20 | Jan-Lennard Struff v Peter Heller | 6-3,6-4 |
| DTB German Pro Series | 2020/06/09 08:00 | Mats Rosenkranz v Peter Heller | 6-1,6-0 |
| ITF - M15 Antalya | 2020/03/12 07:30 | Tristan Boyer v Peter Heller | 1-6,1-6 |
| ITF - M15 Antalya | 2020/03/11 10:05 | Imanol L Morillo v Peter Heller | 5-7,3-6 |
| ITF - M15 Antalya | 2020/03/08 07:00 | Patrick Kypson v Peter Heller | 6-4,6-2 |
| ITF - M15 Antalya | 2020/03/07 07:00 | Peter Heller v Peter Torebko | 6-3,3-6,6-1 |
| ITF - M15 Antalya | 2020/03/06 07:00 | Pol Toledo Bague v Peter Heller | 6-1,5-7,2-6 |
| DTB German Pro Series | 2020/06/11 09:45 | Max Wiskandt v Kai Wehnelt | 6-4,3-6,1-6 |
| DTB German Pro Series | 2020/06/10 13:50 | Oscar Otte v Kai Wehnelt | 6-2,6-1 |
| DTB German Pro Series | 2020/06/09 09:25 | Julian Lenz v Kai Wehnelt | 7-6,3-6,4-6 |
| ITF - M15 Doha | 2020/03/12 12:00 | Kai Wehnelt v Dan Alexandru Tomescu | 4-6,6-3,6-4 |
| ITF - M15 Doha | 2020/03/11 16:20 | Kai Wehnelt v Ryan Nijboer | 2-6,6-4,6-4 |
| ITF - M15 Heraklion | 2020/02/29 09:00 | Kai Wehnelt v Jordan Correia | 6-7,3-6 |
| ITF - M15 Heraklion | 2020/02/28 08:30 | Matvey Khomentovskiy v Kai Wehnelt | 6-7,6-3,0-6 |
| ITF - M15 Heraklion | 2020/02/27 08:30 | Buvaysar Gadamauri v Kai Wehnelt | 5-7,1-6 |