Stadium: Court 6 Round: 26 Ground: Clay
| ITF - M15 Haren | 2019/08/28 10:20 | Alec Adamson v Guy Den Heijer | 2-6,2-6 |
| ITF - M15 Oldenzaal | 2019/08/15 15:20 | Zachary Eisinga v Guy Den Heijer | 7-6,7-5 |
| ITF - M15 Oldenzaal | 2019/08/14 17:20 | Jannik Rother v Guy Den Heijer | 7-5,3-6,4-6 |
| ITF - M15 Eupen | 2019/08/07 08:00 | Guy Den Heijer v Daniel De Jonge | 2-6,3-6 |
| ITF M15 Brussels | 2019/08/04 12:00 | Christopher Heyman v Guy Den Heijer | 2-6,6-0,6-4 |
| ITF M15 Brussels | 2019/08/03 11:00 | Guy Den Heijer v Jesper De Jong | 6-4,4-6,6-0 |
| ITF M15 Brussels | 2019/08/02 13:45 | Michael Geerts v Guy Den Heijer | 3-6,7-5,4-6 |
| ITF M15 Brussels | 2019/08/01 08:00 | Guy Den Heijer v Maxime Hamou | 3-6,6-4,6-2 |
| ITF - M15 Haren | 2019/08/28 09:00 | Alexander Mannapov v Ryan Nijboer | 3-6,2-6 |
| ITF - M15 Oldenzaal | 2019/08/17 14:35 | Jesper De Jong v Ryan Nijboer | 6-4,1-6,6-4 |
| ITF - M15 Oldenzaal | 2019/08/16 09:55 | Colin Van Beem v Ryan Nijboer | 6-7,2-6 |
| ITF - M15 Oldenzaal | 2019/08/15 13:50 | Herman Meeuwes Mattheo Knoop v Ryan Nijboer | 3-6,4-6 |
| ITF - M15 Oldenzaal | 2019/08/14 11:15 | Tim Van Der Horst v Ryan Nijboer | 2-6,1-6 |
| Challenger - Amersfoort | 2019/07/15 16:30 | Ryan Nijboer v Sebastian Fanselow | 4-6,2-6 |
| ITF M15 Marburg | 2019/07/13 12:35 | Jesper De Jong v Ryan Nijboer | 6-3,6-3 |
| ITF M15 Marburg | 2019/07/12 11:40 | Mirko Martinez v Ryan Nijboer | 3-6,1-6 |