Stadium: Court 3 Round: 54 Ground: Clay
| ITF M15 Den Haag | 2019/07/05 14:05 | Guy Den Heijer v Geoffrey Blancaneaux | 6-4,1-6,4-6 |
| ITF M15 Den Haag | 2019/07/04 07:30 | Alex Martinez v Guy Den Heijer | 2-6,2-6 |
| ITF M15 Den Haag | 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 | Matias Zukas v Guy Den Heijer | 6-2,6-1 |
| ITF M15 Alkmaar | 2019/06/26 11:25 | Bart Van Den Berg v Guy Den Heijer | 2-6,7-5,2-6 |
| ITF M15 Alkmaar | 2019/06/25 09:00 | Vasile Antonescu 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 |
| ITF M15 Doha | 2019/03/12 13:30 | Michal Konecny v Guy Den Heijer | 6-4,6-7,3-6 |
| ITF Germany F15 | 2018/10/10 09:00 | Julian kenzlers v Karlo Cubelic | 1-6,1-6 |
| ITF Germany F15 | 2018/10/08 08:00 | Piotr Matuszewski v Julian kenzlers | 1-6,3-6 |
| ITF Germany F9 | 2017/07/30 08:00 | Tim Van Terheijden v Julian kenzlers | 6-0,6-1 |