Stadium: Central Round: 25 Ground: Clay
| ITF M25 Denia | 2023/07/26 16:25 | Sergi Perez Contri v Ryan Nijboer | 6-4,6-3 |
| Challenger Amersfoort | 2023/07/17 10:55 | Niels Visker v Ryan Nijboer | 7-6,3-6,7-5 |
| Challenger Amersfoort | 2023/07/16 14:55 | Ryan Nijboer v Yanaki Milev | 6-0,6-3 |
| ITF M25 Kassel | 2023/07/13 14:25 | Ryan Nijboer v Andrew Paulson | 6-7,4-6 |
| ITF M25 Kassel | 2023/07/11 14:45 | Ryan Nijboer v Viacheslav Bielinskyi | 6-2,6-2 |
| ITF M25 The Hague | 2023/07/07 16:30 | Guy Den Ouden v Ryan Nijboer | 6-1,6-2 |
| ITF M25 The Hague | 2023/07/06 14:05 | Aleksandr Braynin v Ryan Nijboer | 4-6,6-7 |
| ITF M25 The Hague | 2023/07/05 15:15 | Felix Corwin v Ryan Nijboer | 3-6,4-6 |
| ITF M25 Denia | 2023/07/24 15:30 | Toprak Avcibasi v Giacomo Revelli | 4-6,6-2,11-13 |
| ITF M25 Gandia | 2023/07/16 08:00 | Toprak Avcibasi v Ivan Abramov | 6-2,3-6,1-10 |
| ITF M25 La Nucia | 2023/05/29 17:00 | Toprak Avcibasi v Jaime Caldes | 1-6,1-6 |
| ITF M25 Sabadell | 2023/05/01 08:00 | Toprak Avcibasi v Nikolay Nedelchev | 2-6,6-1,8-10 |
| ITF M25 Sanxenxo | 2023/04/26 11:20 | Kuzey Cekirge v Toprak Avcibasi | 6-2,4-6,6-2 |
| ITF M25 Sanxenxo | 2023/04/24 11:00 | Toprak Avcibasi v Ricardo Villacorta-Alonso | 2-6,6-4,10-6 |
| ITF M25 Palmanova | 2023/03/21 10:00 | Vicente O Moratalla v Toprak Avcibasi | 6-4,2-6,10-8 |
| ITF M25 Palmanova | 2023/03/20 08:00 | Toprak Avcibasi v Alvaro Peiro Serrano | 1-6,7-5,11-9 |