Stadium: Voba Meebusch Court Round: 25 Ground: Clay
| Luedenscheid, Germany | 2023/08/01 15:15 | Max Hans Rehberg v Rudolf Molleker | 4-6,2-6 |
| Hamburg, Germany | 2023/07/22 10:20 | Daniel Elahi Galan v Max Hans Rehberg | 4-6,7-6,6-3 |
| Challenger Amersfoort | 2023/07/16 09:00 | Max Hans Rehberg v Tibo Colson | 6-3,6-7,4-6 |
| Challenger Salzburg | 2023/07/10 10:55 | Maxime Chazal v Max Hans Rehberg | 7-6,3-6,6-3 |
| Challenger Salzburg | 2023/07/09 13:45 | Emesz, Benedikt v Max Hans Rehberg | 7-5,4-6,5-7 |
| Challenger Medellin | 2023/06/27 18:00 | Max Hans Rehberg v Matias Soto | 6-7,6-1,1-6 |
| Cali, Colombia | 2023/06/20 16:00 | Gustavo Heide v Max Hans Rehberg | 6-3,6-3 |
| Stuttgart, Germany | 2023/06/10 09:00 | Max Hans Rehberg v Altug Celikbilek | 1-6,4-6 |
| Challenger Liberec | 2023/08/03 12:45 | Daniel Michalski v Dalibor Svrcina | 5-7,6-4,3-6 |
| Challenger Liberec | 2023/07/31 14:00 | Max Houkes v Daniel Michalski | 5-7,4-6 |
| Challenger Tampere | 2023/07/21 11:30 | Henri Squire v Daniel Michalski | 7-5,1-6,6-3 |
| Challenger Tampere | 2023/07/17 14:50 | Patrick Kaukovalta v Daniel Michalski | 3-6,6-7 |
| Challenger Modena | 2023/06/28 13:45 | Daniel Michalski v Emilio Nava | 2-6,2-6 |
| Challenger Modena | 2023/06/27 11:50 | Alibek Kachmazov v Daniel Michalski | 4-6,0-6 |
| Poznan, Poland | 2023/06/22 11:00 | Timo Stodder v Daniel Michalski | 6-1,6-4 |
| Poznan, Poland | 2023/06/21 11:25 | Daniel Michalski v Rudolf Molleker | 6-4,6-2 |