Stadium: Court 9 Round: 25 Ground: Clay
| ITF M25 Arlon | 2023/06/27 11:20 | Boris Fassbender v Aaron Gil Garcia | 6-4,2-6,10-4 |
| ITF M25 Arlon | 2023/06/26 16:35 | Boris Fassbender v Dylan Leigniel | 6-1,6-0 |
| ITF M15 Saarlouis | 2023/06/19 09:30 | Boris Fassbender v Collin Altamirano | 2-6,7-6,8-10 |
| ITF M25 Saint Dizier | 2023/03/29 09:35 | Boris Fassbender v David Jorda Sanchis | 3-6,6-3,4-6 |
| ITF M15 Villers Les Nancy | 2022/11/06 13:25 | Dan Added v Boris Fassbender | 6-4,5-7,6-2 |
| ITF M15 Villers Les Nancy | 2022/11/05 15:45 | Lilian Marmousez v Boris Fassbender | 6-7,3-6 |
| ITF M15 Villers Les Nancy | 2022/11/04 14:35 | Boris Fassbender v Khumoyun Sultanov | 6-4,6-3 |
| ITF M15 Villers Les Nancy | 2022/11/03 17:40 | Boris Fassbender v Francois Musitelli | 6-3,7-6 |
| Challenger Parma | 2023/06/18 12:00 | Andrea Arnaboldi v Sebastian Fanselow | 6-2,6-4 |
| Challenger Heilbronn | 2023/06/06 12:10 | Sebastian Fanselow v Rudolf Molleker | 4-6,7-6,1-6 |
| Challenger Heilbronn | 2023/06/05 10:30 | Sebastian Fanselow v Vladyslav Orlov | 6-3,3-6,6-3 |
| Challenger Heilbronn | 2023/06/04 15:25 | Daniel Dutra Da Silva v Sebastian Fanselow | 4-6,6-7 |
| ITF M25 Jablonec Nad Nisou | 2023/06/03 09:00 | Sebastian Fanselow v Tim Handel | 4-6,2-6 |
| ITF M25 Jablonec Nad Nisou | 2023/06/02 09:00 | Khumoyun Sultanov v Sebastian Fanselow | 5-7,5-7 |
| ITF M25 Jablonec Nad Nisou | 2023/06/01 07:55 | Sebastian Fanselow v Michael Vrbensky | 6-3,4-6,6-3 |
| ITF M25 Jablonec Nad Nisou | 2023/05/31 11:30 | Sebastian Fanselow v Dominik Recek | 6-0,6-3 |