Stadium: Court 6 Round: 19 Ground: Clay
| ITF M25 Wetzlar | 2023/08/06 10:00 | Sebastian Fanselow v Tristan Lamasine | 3-6,1-6 |
| Challenger Forli Qual | 2022/01/16 10:50 | Sebastian Fanselow v Tristan Lamasine | 4-6,6-3,3-6 |
| Challenger Oeiras Qual | 2024/01/07 18:05 | Tristan Lamasine v Martim Simoes | 6-3,6-2 |
| Challenger Oeiras | 2024/01/05 15:20 | Valentin Royer v Tristan Lamasine | 6-4,6-3 |
| Challenger Oeiras | 2024/01/03 11:00 | Jay Clarke v Tristan Lamasine | 6-1,4-6,4-6 |
| Challenger Hamburg | 2023/10/21 10:00 | Dennis Novak v Tristan Lamasine | 4-6,6-3,6-4 |
| Challenger Hamburg | 2023/10/20 10:35 | Akira Santillan v Tristan Lamasine | 4-6,2-6 |
| Challenger Hamburg | 2023/10/19 09:00 | Tristan Lamasine v Maximilian Neuchrist | 7-5,6-4 |
| Challenger Hamburg | 2023/10/17 12:45 | Tristan Lamasine v Manuel Guinard | 6-0,6-0 |
| Challenger Hamburg | 2023/10/16 14:15 | Tristan Lamasine v Jakob Schnaitter | 6-2,6-1 |
| Challenger Oeiras Qual | 2024/01/07 16:00 | Egor Gerasimov v Sebastian Fanselow | 6-7,4-6 |
| Challenger Oeiras | 2024/01/01 18:10 | Cem Ilkel v Sebastian Fanselow | 6-3,3-6,7-5 |
| Challenger Maia | 2023/11/28 12:15 | Sebastian Fanselow v Karl Friberg | 6-3,3-6,4-6 |
| Challenger Champaign | 2023/11/16 18:20 | Sebastian Fanselow v Alex Michelsen | 3-6,2-6 |
| Challenger Champaign | 2023/11/15 00:15 | Aidan Mchugh v Sebastian Fanselow | 2-6,6-4,3-6 |
| Challenger Knoxville | 2023/11/09 16:00 | Zachary Svajda v Sebastian Fanselow | 6-2,7-5 |
| Challenger Knoxville | 2023/11/07 21:40 | Sebastian Fanselow v Cannon Kingsley | 6-4,6-2 |
| Challenger Knoxville | 2023/11/06 17:35 | Sebastian Fanselow v Alex Rybakov | 6-7,6-4,6-4 |