Stadium: Court 12 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Sintra | 2021/09/13 16:30 | Henrik Heise Korsgaard v Jip Van Assendelft | 6-3,4-6,5-10 |
| ITF M25 Eupen | 2021/09/07 07:30 | Juan Ignacio Galarza v Jip Van Assendelft | 4-6,6-2,10-3 |
| ITF M25 Eupen | 2021/09/06 09:15 | Jip Van Assendelft v Jing L Weng | 6-4,6-1 |
| ITF M25 Eupen | 2021/09/05 12:00 | Jip Van Assendelft v Joris Hoogland | 6-2,6-1 |
| ITF M25 Alkmaar | 2021/06/20 12:00 | Jip Van Assendelft v Benjamin Dhoe | 2-6,3-6 |
| ITF M15 - Antalya | 2021/05/30 07:30 | Jip Van Assendelft v Nicolas Agustin Lema | 4-6,7-6,10-12 |
| ITF M15 - Antalya | 2021/05/24 10:00 | Jip Van Assendelft v Davide Albertoni | 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 M25 Sintra | 2021/09/13 16:20 | Mirko Lagasio v Illia Stoliar | 6-4,6-4 |
| ITF M25 Sintra | 2021/09/12 12:00 | Martim Marujo v Mirko Lagasio | 6-7,3-6 |
| ITF M25 Sintra | 2021/09/06 12:00 | Alastair Gray v Mirko Lagasio | 6-0,6-2 |
| ITF M25 Sintra | 2021/09/05 08:30 | Mirko Lagasio v Martim Marujo | 6-4,4-6,11-9 |
| ITF M15 Káhira | 2021/08/01 12:30 | Omar Morsy v Mirko Lagasio | 7-6,6-1 |
| ITF M15 - Antalya | 2021/04/25 07:00 | Mirko Lagasio v Koray Kirci | 2-6,6-7 |
| ITF M15 Sharm El Sheikh | 2021/03/14 13:00 | Mirko Lagasio v Ben Jones | 4-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/03/08 11:30 | Niklas Guttau v Mirko Lagasio | 6-3,4-6,10-4 |