Stadium: COURT 1 Round: 54 Ground: Clay
| Brussels, Singles M-ITF-BEL-03A | 2019/07/29 10:00 | Guy Den Heijer v Kenzlers, Julian | 6-1,6-1 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/05 14:05 | Guy Den Heijer v Geoffrey Blancaneaux | 6-4,1-6,4-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/04 07:30 | Martinez, Alex v Guy Den Heijer | 2-6,2-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/02 12:55 | Guy Den Heijer v Joao Lucas Reis da Silva | 6-4,6-1 |
| ITF M15 Alkmaar | 2019/06/27 10:00 | Zukas, Matias v Guy Den Heijer | 6-2,6-1 |
| ITF M15 Alkmaar | 2019/06/26 11:25 | van Den Berg, Bart v Guy Den Heijer | 2-6,7-5,2-6 |
| ITF M15 Alkmaar | 2019/06/25 09:00 | Antonescu, Vasile v Guy Den Heijer | 4-6,4-6 |
| ITF - M15 Doha | 2019/03/13 12:00 | Jesper De Jong v Guy Den Heijer | 7-5,6-4 |
| Brussels, Singles M-ITF-BEL-03A | 2019/07/29 11:05 | Lenaerts, Yannick v Cloes, Loic | 2-6,2-6 |
| Lasne, Singles Qualifying M-ITF-BEL-02A | 2019/07/02 09:35 | Simon Beaupain v Cloes, Loic | 7-6,6-4 |
| Lasne, Singles Qualifying M-ITF-BEL-02A | 2019/07/01 12:00 | Grigoriu, Patrick v Cloes, Loic | 3-6,1-6 |
| ITF M25 Arlon | 2019/06/24 13:00 | Nincevic, Frane v Cloes, Loic | 3-6,6-3,10-5 |
| ITF Belgium F7 | 2018/08/09 15:30 | Cloes, Loic v Zukas, Matias | 6-7,7-6,1-6 |
| ITF Belgium F7 | 2018/08/06 14:30 | Cloes, Loic v Sinclair, Colin | 7-5,7-5 |
| ITF Belgium F6 | 2018/08/03 11:40 | Sinclair, Colin v Cloes, Loic | 6-3,6-1 |
| ITF Belgium F6 | 2018/08/02 11:00 | Cloes, Loic v Christoph Negritu | 6-1,1-6,7-5 |