| ITF Germany F10 | 2017/08/09 14:30 | Kai Wehnelt v Lenz, Julian | 3-6,3-6 |
| Monterrey, Mexico | 2020/03/02 17:25 | Lenz, Julian v Aleksandar Vukic | 3-6,3-6 |
| Challenger Calgary | 2020/02/27 18:30 | Lenz, Julian v Arthur Rinderknech | 7-6,3-6,6-7 |
| Challenger Calgary | 2020/02/26 19:45 | Lenz, Julian v Shintaro Imai | 6-3,3-6,7-6 |
| Challenger - Koblenz | 2020/02/18 14:15 | Lenz, Julian v Maximilian Marterer | 1-6,3-6 |
| Challenger Launceston | 2020/02/04 04:10 | Lenz, Julian v Benjamin Lock | 2-6,7-5,6-7 |
| Challenger - Burnie | 2020/01/28 01:30 | Lenz, Julian v Kavcic, Blaz | 4-6,4-6 |
| Open d'Australie | 2020/01/14 01:55 | Pedro Martinez v Lenz, Julian | 6-0,6-1 |
| Challenger Ortisei | 2019/11/11 14:45 | Lenz, Julian 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 Héraklion | 2020/02/29 09:00 | Kai Wehnelt v Jordan Correia Passos Do Carmo | 6-7,3-6 |
| ITF - M15 Héraklion | 2020/02/28 08:30 | Khomentovskiy, Matvey v Kai Wehnelt | 6-7,6-3,0-6 |
| ITF - M15 Héraklion | 2020/02/27 08:30 | Buvaysar Gadamauri v Kai Wehnelt | 5-7,1-6 |
| ITF - M15 Héraklion | 2020/02/26 11:00 | Schmitz, Constantin v Kai Wehnelt | 4-6,6-7 |
| ITF - M15 Héraklion | 2020/02/19 10:00 | Kai Wehnelt v Giacalone, Omar | 6-7,6-1,6-7 |
| ITF - M15 Héraklion | 2020/02/12 12:10 | Kai Wehnelt v Geens, Clement | 2-6,2-6 |