Stadium: Court 4 Round: 14 Ground: Clay
| ITF M25 Bourg-en-Bresse | 2021/06/29 13:00 | Viktor Durasovic v Sebastian Fanselow | 1-6,7-6,6-2 |
| Challenger Milan | 2021/06/20 13:15 | Sebastian Fanselow v Camilo Ugo Carabelli | 6-3,2-6,2-6 |
| Challenger Forli | 2021/06/15 09:30 | Sebastian Fanselow v Camilo Ugo Carabelli | 2-6,2-6 |
| Challenger Forli | 2021/06/14 09:30 | Sebastian Fanselow v Luca Vanni | 2-6,6-2,7-5 |
| Challenger Forli | 2021/06/13 12:20 | Sebastian Fanselow v Antoine Bellier | 6-3,6-4 |
| Challenger Orlando | 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 | Michail Pervolarakis v Sebastian Fanselow | 4-6,5-7 |
| ITF M25 The Hague | 2021/07/01 09:55 | Manuel Guinard v Lucas Gerch | 6-3,6-2 |
| ITF M25 The Hague | 2021/06/29 11:20 | Lucas Gerch v Vladimir Ivanov | 6-1,6-2 |
| Challenger Forli | 2021/06/16 09:30 | Francesco Forti v Lucas Gerch | 6-4,6-4 |
| Challenger Forli | 2021/06/15 09:30 | Lucas Gerch v Thiago Agustin Tirante | 7-6,3-6,6-3 |
| Challenger Forli | 2021/06/14 09:30 | Lucas Gerch v Elmar Ejupovic | 4-6,6-4,7-6 |
| Challenger Forli | 2021/06/13 09:45 | Alessandro Bega v Lucas Gerch | 3-6,1-6 |
| ITF M15 Antalya | 2021/05/28 08:20 | Pol Martin Tiffon v Lucas Gerch | 7-5,6-3 |
| ITF M15 Antalya | 2021/05/27 10:10 | Paul Woerner v Lucas Gerch | 7-5,6-7,3-6 |