Stadium: VOLKSBANK Court Round: 26 Ground: Clay
| ITF M25 Ueberlingen | 2021/08/18 15:00 | Louis Wessels v Oscar Galimardanov | 6-4,6-2 |
| ITF M25 Frankfurt am Main | 2021/08/13 14:00 | Lucas Gerch v Louis Wessels | 3-6,6-3,6-4 |
| ITF M25 Frankfurt am Main | 2021/08/12 08:55 | Sandro Kopp v Louis Wessels | 1-6,1-6 |
| ITF M25 Frankfurt am Main | 2021/08/11 10:45 | Yan Sabanin 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 Matthew Romios | 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 | Alexander Kotzen v Louis Wessels | 2-6,6-3,6-4 |
| ITF M25 Ueberlingen | 2021/08/18 14:10 | Milan Welte v Constantin Bittoun Kouzmine | 6-4,6-0 |
| ITF M25 Frankfurt am Main | 2021/08/09 14:10 | Milan Welte v Taiyo Yamanaka | 6-7,4-6 |
| ITF M15 Parnu | 2021/08/04 09:20 | Vladimir Ivanov v Milan Welte | 7-5,1-6,6-3 |
| ITF M25 Marburg | 2021/07/09 12:00 | Ryan Nijboer v Milan Welte | 4-6,6-3,6-1 |
| ITF M25 Marburg | 2021/07/08 08:55 | Milan Welte v Neo Niedner | 6-2,6-1 |
| ITF M25 Marburg | 2021/07/07 12:30 | Daniel Cukierman v Milan Welte | 4-6,4-6 |
| ITF M25 Marburg | 2021/07/06 15:00 | Milan Welte v Raphael Collignon | 7-6,6-3 |
| ITF M25 Marburg | 2021/07/05 13:05 | Milan Welte v Christopher Patzanovsky | 6-1,6-3 |