Stadium: CEE Logistic Round: 27 Ground: Clay
| ITF - M15 Allershausen | 2023/08/31 10:00 | Diego Dedura-Palomero v Tim Ruehl | 3-6,3-6 |
| ITF - M15 Allershausen | 2023/08/30 12:40 | Tim Ruehl v Vincent Marysko | 6-4,6-0 |
| ITF - M15 Allershausen | 2023/08/30 08:00 | Tim Ruehl v Erwin Troebinger | 6-1,6-1 |
| ITF - M15 Prijedor | 2023/05/19 11:20 | Petr Brunclik v Tim Ruehl | 6-7,6-4,10-7 |
| ITF - M15 Prijedor | 2023/05/19 07:00 | Tim Ruehl v Stefan Kostic | 6-1,6-1 |
| ITF - M15 Prijedor | 2023/05/17 14:00 | Corey Gaal v Tim Ruehl | 3-6,2-6 |
| ITF - M15 Prijedor | 2023/05/15 09:00 | Tim Ruehl v Luka Miklavcic | 6-3,7-5 |
| ITF - M15 Alaminos-Larnaca | 2023/05/01 06:00 | Jonas Trinker v Tim Ruehl | 7-6,3-6,10-8 |
| ITF - M15 Allershausen | 2023/08/31 14:55 | Johannes Haerteis v Nicola Kuhn | 5-7,3-6 |
| ITF - M15 Allershausen | 2023/08/30 11:40 | Nicola Kuhn v Hazem Naw | 6-3,4-6,6-2 |
| Challenger - Augsburg | 2023/08/21 08:00 | Christoph Negritu v Nicola Kuhn | 2-6,6-3,7-5 |
| Challenger - Augsburg | 2023/08/20 08:00 | Nicola Kuhn v Sebastian Gima | 6-1,6-3 |
| Challenger - Meerbusch | 2023/08/08 10:25 | Nicola Kuhn v Jan Choinski | 6-7,4-6 |
| ITF - M25 Wetzlar | 2023/08/04 12:30 | Nicola Kuhn v Tristan Lamasine | 6-7,4-6 |
| ITF - M25 Wetzlar | 2023/08/04 08:00 | Luca Wiedenmann v Nicola Kuhn | 4-6,4-6 |
| ITF - M25 Wetzlar | 2023/08/03 08:00 | Nicola Kuhn v Martin Benes | 6-4,6-1 |