Round: 25 Ground: Clay
| ITF Belgium F6 | 2017/07/28 09:00 | Mats Moraing v Guy Den Heijer | 3-6,6-3,6-2 |
| ITF Belgium F6 | 2017/07/27 16:15 | Guy Den Heijer v Ricardo Hocevar | 4-6,6-4,7-6 |
| ITF Belgium F6 | 2017/07/24 09:30 | Guy Den Heijer v Michael Geerts | 7-6,7-6 |
| ITF Netherlands F4 | 2017/07/10 08:00 | Guy Den Heijer v Tim Van Terheijden | 4-6,4-6 |
| ITF Netherlands F3 | 2017/07/04 10:00 | Marc Dijkhuizen v Guy Den Heijer | 6-3,2-6,6-1 |
| ITF Netherlands F2 | 2017/06/27 09:00 | Guy Den Heijer v Fred Simonsson | 4-6,4-6 |
| ITF Netherlands F1 | 2017/06/22 17:55 | Botic Van De Zandschulp v Guy Den Heijer | 6-3,6-2 |
| ITF Netherlands F1 | 2017/06/20 09:25 | Vincent Van Den Honert v Guy Den Heijer | 3-6,2-6 |
| ITF Belgium F6 | 2017/07/24 09:35 | Maxime Pauwels v Niels Desein | 6-3,7-6 |
| ITF Belgium F5 | 2017/07/18 08:00 | Niels Desein v Ricardo Hocevar | 6-7,4-6 |
| ITF France F9 | 2017/04/26 15:55 | Laurent Lokoli v Niels Desein | 6-4,6-4 |
| ITF France F9 | 2017/04/25 12:30 | Niels Desein v Pierre Faivre | 6-4,2-6,6-4 |
| Challenger St Brieuc Qual | 2017/03/26 16:05 | Niels Desein v Egor Gerasimov | 4-6,2-6 |
| Challenger St Brieuc Qual | 2017/03/26 09:05 | Niels Desein v Vladimir Ivanov | 6-2,6-4 |
| ITF France F7 | 2017/03/24 10:00 | Niels Desein v Antal Van Der Duim | 6-1,6-7,3-6 |
| ITF France F7 | 2017/03/22 18:40 | Niels Desein v Sebastien Boltz | 7-6,7-5 |