Stadium: Central Round: 26 Ground: Clay
| ITF M15 Esch/Alzette | 2021/07/20 11:00 | Benjamin Dhoe v Alexander Kotzen | 3-6,4-6 |
| ITF M15 Esch/Alzette | 2021/07/19 09:00 | Alexander Kotzen v Tibo Colson | 4-6,6-1,10-7 |
| ITF M15 Esch/Alzette | 2021/07/18 07:55 | Alexander Kotzen v Victor Ernaelsteen | 6-1,6-4 |
| ITF M15 Monastir | 2021/06/27 09:00 | Alexander Kotzen v Noah Lopez | 6-7,6-4,7-10 |
| ITF M15 Monastir | 2021/06/21 13:30 | Alexander Kotzen v Kody Pearson | 7-6,1-6,5-10 |
| ITF M15 Monastir | 2021/06/21 09:00 | Alexander Kotzen v Geun Jun Kim | 6-0,6-2 |
| ITF M15 Monastir | 2021/06/20 10:30 | Alexander Kotzen v Cesar Bourgois | 7-5,6-7,10-4 |
| ITF M15 Monastir | 2021/06/17 08:30 | Alexander Kotzen v Luciano Darderi | 3-6,2-6 |
| ITF M15 Esch/Alzette | 2021/07/20 11:00 | Yan Sabanin 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 Marko Tepavac | 6-3,3-6,6-3 |
| ITF M25 Marburg | 2021/07/09 14:55 | Henri Squire v Louis Wessels | 3-6,5-7 |
| ITF M25 Marburg | 2021/07/08 10:35 | Louis Wessels v Alexander Donski | 6-4,6-7,6-4 |
| ITF M25 Marburg | 2021/07/07 13:00 | Louis Wessels v Niklas Schell | 6-3,6-4 |
| ITF M25 Alkmaar | 2021/06/23 12:10 | Louis Wessels v Carlos Lopez Montagud | 3-6,6-4,4-6 |
| ITF M15 Bucharest | 2021/05/25 15:00 | Facundo Juarez v Louis Wessels | 6-2,6-0 |