Estádio: Court 1 Round: 27 Ground: Clay
| ITF - M25 Haia | 2023/07/05 14:05 | Kai Wehnelt v Sander Jong | 1-6,2-6 |
| ITF - M25 Alkmaar | 2021/06/23 16:10 | Kai Wehnelt v Sander Jong | 6-2,7-6 |
| ITF - M25 Poznan | 2023/08/24 09:00 | Maks Kasnikowski v Kai Wehnelt | 4-6,4-6 |
| ITF - M25 Poznan | 2023/08/23 12:45 | Siim Troost v Kai Wehnelt | 7-6,0-6,0-6 |
| ITF - M25 Koksijde | 2023/08/14 12:00 | Kai Wehnelt v Luciano Emanuel Ambrogi | 3-6,3-6 |
| Challenger - Meerbusch | 2023/08/07 10:00 | Georgii Kravchenko v Kai Wehnelt | 6-4,7-6 |
| Challenger - Lüedenscheid | 2023/07/31 15:25 | Duje Ajdukovic v Kai Wehnelt | 6-4,3-6,6-3 |
| Challenger - Lüedenscheid | 2023/07/30 12:05 | Kai Wehnelt v Jose Pereira | 6-2,6-4 |
| ITF - M25 Kramsach | 2023/07/27 13:45 | Kai Wehnelt v Peter Heller | 5-7,4-6 |
| ITF - M25 Kramsach | 2023/07/26 12:20 | Kai Wehnelt v Manuel Plunger | 6-3,3-6,6-2 |
| ITF - M25 Poznan | 2023/08/24 09:00 | Sander Jong v Tommaso Compagnucci | 6-1,6-4 |
| ITF - M25 Poznan | 2023/08/23 08:25 | Michael Agwi v Sander Jong | 4-6,4-6 |
| ITF - M15 Eindhoven | 2023/08/04 12:35 | Elmer Moller v Sander Jong | 6-2,7-5 |
| ITF - M15 Eindhoven | 2023/08/03 14:30 | Sander Jong v Tom Gentzsch | 1-6,6-2,6-3 |
| ITF - M15 Eindhoven | 2023/08/02 13:50 | Sander Jong v Mees Rottgering | 7-5,6-2 |
| ITF - M15 Eindhoven | 2023/08/01 10:30 | Sander Jong v Dax Donders | 6-3,6-3 |
| ITF - M15 Metzingen | 2023/07/29 11:30 | Sander Jong v Nicola Kuhn | 3-6,3-6 |
| ITF - M15 Metzingen | 2023/07/28 10:50 | Kai Lemstra v Sander Jong | 6-3,0-6,2-6 |