| UTR Pro Tennis Series - Amsterdam | 2021/11/03 09:00 | Miko Wassermann v Jip Van Assendelft | 1-6,4-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/02 10:30 | Guy Den Heijer v Jip Van Assendelft | 6-4,5-2 |
| ITF - Hamburg M25 | 2021/10/17 07:55 | Romain Faucon v Jip Van Assendelft | 1-6,6-1,11-9 |
| ITF - Sintra M25 | 2021/09/15 15:20 | Jip Van Assendelft v Rio Noguchi | 6-4,0-6,1-6 |
| ITF - Sintra M25 | 2021/09/14 09:55 | Jip Van Assendelft v Mirko Lagasio | 7-6,6-0 |
| ITF - Sintra M25 | 2021/09/13 16:30 | Henrik Heise Korsgaard v Jip Van Assendelft | 6-3,4-6,5-10 |
| ITF - Eupen M25 | 2021/09/07 07:30 | Juan Ignacio Galarza v Jip Van Assendelft | 4-6,6-2,10-3 |
| ITF - Eupen M25 | 2021/09/06 09:15 | Jip Van Assendelft v Jing L Weng | 6-4,6-1 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/02 12:00 | Miko Wassermann v Johann Willems | 2-6,2-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/01 13:30 | Johann Willems v Lawrence Bataljin | 6-1,5-1 |
| UTR Pro Tennis Series - Mulheim | 2021/10/17 08:30 | Johann Willems v Christian Hansen | 6-1,5-1 |
| UTR Pro Tennis Series - Mulheim | 2021/10/16 08:15 | Constantin Schmitz v Johann Willems | 3-6,1-6 |
| UTR Pro Tennis Series - Mulheim | 2021/10/15 11:30 | Eric Vanshelboim v Johann Willems | 2-6,4-6 |
| UTR Pro Tennis Series - Mulheim | 2021/10/14 08:30 | Diego Balderas v Johann Willems | 0-6,2-6 |
| UTR Pro Tennis Series - Mulheim | 2021/10/12 07:00 | Ivan Marrero Curbelo v Johann Willems | 2-6,3-5 |
| UTR Pro Tennis Series - Mulheim | 2021/10/11 12:15 | Johann Willems v Benjamin Dhoe | 6-2,5-1 |