Stadion: Court 4 Round: 54 Ground: Clay
| ITF - M25 - Uriage | 2021/07/11 15:30 | Elijah Poritzky v Batiste Guerra | 6-2,6-3 |
| ITF - M25 - Wetzlar | 2021/08/03 08:55 | Johann Lars v Jannik Rother | 6-4,5-7,5-10 |
| ITF - M25 - Klosters | 2021/06/20 08:40 | Johann Lars v Yannik Steinegger | 2-6,4-6 |
| ITF - M15 - Heraklion | 2021/05/23 06:30 | Federico Arnaboldi v Johann Lars | 6-1,6-2 |
| ITF - M15 - Heraklion | 2021/05/17 07:00 | Johann Lars v Sergis Kyratzis | 6-7,4-6 |
| ITF - M15 - Heraklion | 2021/05/16 07:00 | Johann Lars v Adam Jones | 7-6,2-6,10-4 |
| ITF - M15 - Troisdorf | 2021/05/09 08:00 | Johann Lars v Sidane Pontjodikromo | 1-6,1-6 |
| ITF - M25 - Meerbusch | 2021/04/12 13:00 | Johann Lars v Mats Hermans | 6-3,2-6,3-10 |
| ITF - M25 - Meerbusch | 2021/04/12 09:00 | Johann Lars v Christopher Patzanovsky | 6-4,4-6,10-8 |