Stadium: Court 1 Round: 26 Ground: Clay
| ITF M25 Frankfurt am Main | 2021/08/11 09:00 | Penzlin, Julien v Sandro Kopp | 4-6,3-6 |
| ITF M25 Frankfurt am Main | 2021/08/10 08:30 | Sandro Kopp v Fritsche, Dominik | 6-4,6-3 |
| ITF M25 Frankfurt am Main | 2021/08/09 09:00 | Sandro Kopp v Wunderlich, Yannick | 6-3,6-4 |
| ITF M15 Frederiksberg | 2021/08/05 08:00 | Sandro Kopp v Kirkov, Vasil | 6-4,3-6,1-6 |
| ITF M15 Frederiksberg | 2021/08/03 10:55 | Guy Den Ouden v Sandro Kopp | 4-6,4-6 |
| ITF M15 Vejle | 2021/07/29 08:00 | Zukas, Matias v Sandro Kopp | 6-3,6-1 |
| ITF M15 Vejle | 2021/07/27 08:00 | Elmer Moller v Sandro Kopp | 0-6,5-7 |
| ITF M25 Kottingbrunn | 2021/07/22 08:00 | Giovanni Fonio v Sandro Kopp | 6-1,7-5 |
| ITF M25 Frankfurt am Main | 2021/08/11 10:45 | Sabanin, Yan v Louis Wessels | 1-6,0-6 |
| ITF M25 Wetzlar | 2021/08/06 13:45 | Louis Wessels v Harold Mayot | 5-7,4-6 |
| ITF M25 Wetzlar | 2021/08/05 09:00 | Louis Wessels v Romios, Matthew Christopher | 6-3,6-1 |
| ITF M25 Wetzlar | 2021/08/04 09:30 | Louis Wessels v Giles Hussey | 6-3,7-6 |
| ITF M15 Esch/Alzette | 2021/07/21 10:55 | Kotzen, Alexander v Louis Wessels | 2-6,6-3,6-4 |
| ITF M15 Esch/Alzette | 2021/07/20 11:00 | Sabanin, Yan v Louis Wessels | 6-7,0-6 |
| ITF M25 Marburg | 2021/07/11 10:30 | Nick Hardt v Louis Wessels | 6-4,5-7,6-7 |
| ITF M25 Marburg | 2021/07/10 13:00 | Louis Wessels v Tepavac, Marko | 6-3,3-6,6-3 |