Stadium: Sparkassen Court Round: 25 Ground: Clay
| ITF M25 Alkmaar | 2021/06/23 12:10 | Louis Wessels v Carlos Lopez Montagud | 3-6,6-4,4-6 |
| ITF - M15 Bucarest | 2021/05/25 15:00 | Facundo Juarez v Louis Wessels | 6-2,6-0 |
| ITF M15 Troisdorf | 2021/05/14 16:10 | Louis Wessels v Sebastian Fanselow | 4-6,5-7 |
| ITF M15 Troisdorf | 2021/05/13 11:45 | Louis Wessels v Marlon Vankan | 4-6,6-2,7-6 |
| ITF M15 Troisdorf | 2021/05/12 11:40 | Louis Wessels v Smits, Glenn | 6-1,6-3 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/21 08:00 | Louis Wessels v Simon Beaupain | 7-5,1-6,5-7 |
| ITF M25 Meerbusch | 2021/04/14 10:00 | Louis Wessels v Niels Visker | 2-6,2-6 |
| ITF - M25 Naples | 2021/02/25 18:10 | Hidalgo, Diego v Louis Wessels | 6-2,6-4 |
| ITF M25 Klosters | 2021/06/20 08:55 | Zimmermann, Ilias v Niklas Schell | 6-4,4-6,12-10 |
| ITF - M15 Antalya | 2021/05/23 07:00 | Niklas Schell v Stefano D'Agostino | 4-6,6-3,7-10 |
| ITF M15 Troisdorf | 2021/05/09 08:00 | Marlon Vankan v Niklas Schell | 2-6,7-6,13-11 |
| ITF - M15 Monastir | 2021/04/18 13:00 | Breut, Lilian v Niklas Schell | 6-2,6-3 |
| ITF - M15 Monastir | 2021/04/14 08:30 | Niklas Schell v Giorgio Ricca | 3-6,2-6 |
| ITF - M15 Monastir | 2021/04/12 13:00 | Leyton Rivera v Niklas Schell | 4-6,7-6,8-10 |
| ITF - M15 Monastir | 2021/04/11 11:00 | Viktor Jovic v Niklas Schell | 6-7,2-6 |
| ITF - M25 Trimbach | 2021/03/10 11:45 | Elmar Ejupovic v Niklas Schell | 7-6,6-4 |