Stadium: Court 17 Round: 25 Ground: Clay
| ITF M25 Wetzlar | 2023/08/03 08:00 | Niklas Schell v Jannik Opitz | 6-4,6-4 |
| ITF M15 Uslar | 2023/07/19 10:00 | Jannik Opitz v Esteban Bruna | 2-6,4-6 |
| Challenger Braunschweig | 2023/07/09 12:40 | Daniel Masur v Jannik Opitz | 7-5,6-4 |
| ITF M25 Nussloch | 2023/01/27 13:55 | Hazem Naw v Jannik Opitz | 6-4,1-6,7-6 |
| ITF M25 Nussloch | 2023/01/26 12:15 | Jannik Opitz v Dominik Recek | 6-7,7-6,7-6 |
| ITF M25 Nussloch | 2023/01/25 15:05 | Tim Sandkaulen v Jannik Opitz | 6-7,1-6 |
| ITF M25 Nussloch | 2023/01/23 15:50 | Lukas Pokorny v Jannik Opitz | 2-6,6-7 |
| ITF M25 Nussloch | 2023/01/23 09:00 | Niklas Koch v Jannik Opitz | 3-6,4-6 |