| ITF Germany F10 | 2017/08/09 14:30 | Kai Wehnelt v Julian Lenz | 3-6,3-6 |
| Challenger Monterrey | 2020/03/02 17:25 | Julian Lenz v Aleksandar Vukic | 3-6,3-6 |
| Challenger Calgary | 2020/02/27 18:30 | Julian Lenz v Arthur Rinderknech | 7-6,3-6,6-7 |
| Challenger Calgary | 2020/02/26 19:45 | Julian Lenz v Shintaro Imai | 6-3,3-6,7-6 |
| Challenger Koblenz | 2020/02/18 14:15 | Julian Lenz v Maximilian Marterer | 1-6,3-6 |
| Challenger Launceston | 2020/02/04 04:10 | Julian Lenz v Benjamin Lock | 2-6,7-5,6-7 |
| Challenger Burnie | 2020/01/28 01:30 | Julian Lenz v Blaz Kavcic | 4-6,4-6 |
| Australian Open | 2020/01/14 01:55 | Pedro Martinez v Julian Lenz | 6-0,6-1 |
| Challenger Ortisei | 2019/11/11 14:45 | Julian Lenz v Daniel Masur | 6-7,6-4,3-6 |
| 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 |
| ITF M15 Heraklion | 2020/02/26 11:00 | Constantin Schmitz v Kai Wehnelt | 4-6,6-7 |
| ITF M15 Heraklion | 2020/02/19 10:00 | Kai Wehnelt v Omar Giacalone | 6-7,6-1,6-7 |
| ITF M15 Heraklion | 2020/02/12 12:10 | Kai Wehnelt v Clement Geens | 2-6,2-6 |