Stadium: Court 4 Round: 28 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2023/02/11 14:30 | Ryan Nijboer v Nicolas Tepmahc | 6-2,6-2 |
| ITF M15 Monastir | 2023/02/11 10:45 | Ryan Nijboer v Florent Bax | 7-5,6-2 |
| ITF M15 Monastir | 2023/02/09 09:30 | Kris Van Wyk v Ryan Nijboer | 6-7,6-2,4-6 |
| ITF M15 Monastir | 2023/02/01 10:45 | Ryan Nijboer v David Perez Sanz | 6-7,7-5,3-6 |
| ITF M15 Madrid | 2022/12/09 11:20 | Miguel Damas v Ryan Nijboer | 3-6,6-2,6-0 |
| ITF M15 Madrid | 2022/12/08 10:00 | Ryan Nijboer v Alejandro Moro Canas | 1-6,6-3,6-4 |
| ITF M15 Madrid | 2022/12/06 11:00 | Diego F Flores v Ryan Nijboer | 1-6,4-6 |
| ITF M15 Antalya | 2022/11/29 09:25 | Filip Cristian Jianu v Ryan Nijboer | 6-4,6-2 |
| ITF M15 Monastir | 2023/02/11 15:00 | Tim Handel v Olaf Pieczkowski | 2-6,6-7 |
| ITF M15 Monastir | 2023/02/11 10:45 | Olaf Pieczkowski v Giorgio Tabacco | 6-3,6-4 |
| ITF M15 Monastir | 2023/02/08 11:00 | Olaf Pieczkowski v Dali Blanch | 7-5,6-0 |
| ITF M15 Monastir | 2023/02/02 11:20 | Kalin Ivanovski v Olaf Pieczkowski | 6-2,6-1 |
| ITF M15 Monastir | 2023/02/01 09:00 | Olaf Pieczkowski v Andrea Picchione | 2-6,6-3,6-2 |
| ITF M15 Vilnius | 2023/01/17 14:00 | Olaf Pieczkowski v Mick Veldheer | 1-6,2-6 |
| ITF M15 Monastir | 2022/11/24 08:00 | Olaf Pieczkowski v Constantin Bittoun Kouzmine | 3-6,6-7 |
| ITF M15 Monastir | 2022/11/23 09:20 | Aziz Ouakaa v Olaf Pieczkowski | 1-6,2-6 |