Stadium: Grandstand Round: 19 Ground: Clay
| Forli 6, Italy | 2021/06/13 12:20 | Sebastian Fanselow v Antoine Bellier | 6-3,6-4 |
| Orlando, USA | 2021/06/06 14:00 | Thiago Agustin Tirante v Sebastian Fanselow | 6-2,3-6,6-4 |
| Challenger - Little Rock | 2021/05/31 15:00 | Alexis Galarneau v Sebastian Fanselow | 3-6,6-3,6-4 |
| Challenger - Little Rock | 2021/05/30 15:00 | Pervolarakis, Michail v Sebastian Fanselow | 4-6,5-7 |
| ITF M15 Troisdorf | 2021/05/15 13:25 | Elmar Ejupovic v Sebastian Fanselow | 7-6,6-4 |
| ITF M15 Troisdorf | 2021/05/14 16:10 | Louis Wessels v Sebastian Fanselow | 4-6,5-7 |
| ITF M15 Troisdorf | 2021/05/13 13:25 | Netuschil, Marvin v Sebastian Fanselow | 2-6,1-6 |
| ITF M15 Troisdorf | 2021/05/11 11:00 | Dietel, Maximilian v Sebastian Fanselow | 0-6,1-6 |
| Forli 6, Italy | 2021/06/13 11:15 | Vianello, Michele v Vanni, Luca | 3-6,4-6 |
| ITF M15 Gaiba | 2021/06/09 12:25 | Antoine Bellier v Vanni, Luca | 5-7,6-3,6-2 |
| Challenger Biella | 2021/05/31 11:05 | Vanni, Luca v Camilo Ugo Carabelli | 2-6,2-6 |
| Challenger Biella | 2021/05/30 12:00 | Evgeny Karlovskiy v Vanni, Luca | 3-6,1-6 |
| Challenger Biella | 2021/05/17 08:00 | Tomas Martin Etcheverry v Vanni, Luca | 6-4,6-3 |
| Challenger Biella | 2021/05/16 10:30 | Vanni, Luca v Nino Serdarusic | 6-1,6-3 |
| Challenger Biella | 2021/05/04 13:55 | Vanni, Luca v Mayer, Leonardo | 6-7,0-6 |
| ITF - M25 Angers | 2021/04/20 15:35 | Vanni, Luca v Manuel Guinard | 1-6,7-6,1-6 |