Stadium: M (CC) Round: 26 Ground: Clay
| ITF M15 Oldenzaal | 2019/08/14 15:15 | Knoop, Herman Meeuwes Mattheo v Niels Visker | 6-3,6-4 |
| ITF M15 Oldenzaal | 2019/08/13 07:30 | Hermans, Mats v Knoop, Herman Meeuwes Mattheo | 6-7,3-6 |
| ITF M15 Oldenzaal | 2019/08/12 07:30 | Mannapov, Alexander v Knoop, Herman Meeuwes Mattheo | 1-6,4-6 |
| ITF M15 Alkmaar | 2019/06/24 09:30 | Tverijonas, Julius v Knoop, Herman Meeuwes Mattheo | 6-2,6-2 |
| ITF South Africa F3 | 2018/12/03 12:00 | Knoop, Herman Meeuwes Mattheo v Thirouin, Jean | 0-6,3-6 |
| ITF South Africa F3 Qual | 2018/12/02 07:00 | Shamma, Nicholas v Knoop, Herman Meeuwes Mattheo | 4-6,0-6 |
| ITF South Africa F3 Qual | 2018/12/01 07:00 | Wilson Baig, Euan v Knoop, Herman Meeuwes Mattheo | 3-6,2-6 |
| Afrique du Sud F2, Qualifications Simples | 2018/11/25 11:00 | Shamma, Nicholas v Knoop, Herman Meeuwes Mattheo | 6-3,6-3 |
| ITF M15 Oldenzaal | 2019/08/14 11:15 | van Der Horst, Tim 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 | Martinez, Mirko v Ryan Nijboer | 3-6,1-6 |
| ITF M15 Marburg | 2019/07/11 17:50 | Yannik Steinegger v Ryan Nijboer | 6-7,1-6 |
| ITF M15 Marburg | 2019/07/10 11:00 | Joao Lucas Reis da Silva v Ryan Nijboer | 2-6,7-5,3-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/07 10:00 | Zukas, Matias v Ryan Nijboer | 6-4,6-2 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/05 10:55 | Yanais Laurent v Ryan Nijboer | 2-6,2-6 |