Stadium: Court 6 Round: 62 Ground: Clay
| ITF M25 Alkmaar | 2021/06/20 12:00 | Jip Van Assendelft v Dhoe, Benjamin | 2-6,3-6 |
| ITF - M15 Antalya | 2021/05/30 07:30 | Jip Van Assendelft v Lema, Nicolas Agustin | 4-6,7-6,10-12 |
| ITF - M15 Antalya | 2021/05/24 10:00 | Jip Van Assendelft v Albertoni, Davide | 2-6,1-6 |
| ITF - M15 Antalya | 2021/05/23 07:00 | John Sperle v Jip Van Assendelft | 5-7,7-5,4-10 |
| ITF - M15 Monastir | 2021/04/11 10:00 | Jip Van Assendelft v Matuszewski, Piotr | 5-7,4-6 |
| ITF - M15 Monastir | 2021/04/05 09:00 | Jip Van Assendelft v Romain Faucon | 3-6,6-1,7-10 |
| ITF - M15 Monastir | 2021/04/04 10:30 | Justin Roberts v Jip Van Assendelft | 1-6,3-6 |
| ITF - M25 Trimbach | 2021/03/08 13:35 | Hartmeier, Patrik v Jip Van Assendelft | 7-5,7-5 |
| ITF M25 Bourg-en-Bresse | 2021/06/27 14:00 | Obert, Adrian v Hoogland, Joris | 6-1,6-1 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/05/30 10:30 | Marino Jakic v Hoogland, Joris | 6-3,6-2 |
| ITF - M25 Kiseljak | 2021/05/23 08:15 | Heger, Tim v Hoogland, Joris | 7-6,6-4 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/16 07:30 | Hoogland, Joris v Martin Zeljenka | 6-7,3-6 |
| ITF - M15 Prijedor | 2021/05/09 07:00 | Hoogland, Joris v Vukovic, Milos | 2-6,2-6 |
| ITF - M15 Monastir | 2021/01/10 13:00 | Hoogland, Joris v Dominik Palan | 0-6,2-6 |
| ITF - M15 Monastir | 2021/01/10 09:00 | Hoogland, Joris v Arthur Bonnaud | 4-6,6-4,11-9 |
| ITF - M15 Monastir | 2021/01/03 11:00 | Cyril Vandermeersch v Hoogland, Joris | 6-3,6-1 |