Stadium: Hard 21 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/11/18 10:25 | Guy Den Heijer v Nicholas David Ionel | 1-6,7-5,1-6 |
| ITF M15 Heraklion | 2021/11/17 13:25 | Sergis Kyratzis v Guy Den Heijer | 6-0,4-6,4-6 |
| ITF M15 Heraklion | 2021/11/11 07:00 | Guy Den Heijer v Alec Deckers | 4-6,6-7 |
| ITF M15 Heraklion | 2021/11/10 07:00 | Guy Den Heijer v Max Houkes | 7-6,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/07 10:30 | Guy Den Heijer v Sem Verbeek | 6-3,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 12:00 | Deney Wassermann v Guy Den Heijer | 2-6,5-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 13:30 | Guy Den Heijer v Johann Willems | 7-6,2-6,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/03 10:30 | Guy Den Heijer v Lawrence Bataljin | 6-0,6-3 |
| ITF M25 Calabasas | 2021/10/27 00:10 | Daniel De Jonge v Arthur Fery | 6-4,3-6,6-1 |
| ITF M25 Eupen | 2021/09/11 10:45 | Arthur Fery v Matteo Arnaldi | 7-5,2-6,5-7 |
| ITF M25 Eupen | 2021/09/10 08:00 | Arthur Fery v Romain Faucon | 7-6,6-2 |
| ITF M25 Eupen | 2021/09/09 07:30 | Arthur Fery v Buvaysar Gadamauri | 7-5,6-1 |
| ITF M25 Eupen | 2021/09/08 07:30 | Hernan Casanova v Arthur Fery | 6-2,3-6,2-6 |
| ITF M25 Eupen | 2021/09/07 09:25 | Arthur Fery v Marcel Hornung | 6-2,6-1 |
| ITF M25 Eupen | 2021/09/06 12:05 | Arthur Fery v Jimmy Yang | 6-1,6-4 |
| ITF M15 Huy | 2021/08/27 11:00 | Raphael Collignon v Arthur Fery | 6-3,6-3 |