Stadium: Court 4 Round: 25 Ground: Clay
| ITF M25 La Nucia | 2023/06/01 13:00 | Ryan Nijboer v Yshai Oliel | 2-6,1-6 |
| ITF M25 La Nucia | 2023/06/01 07:00 | Ryan Nijboer v Jaime Caldes | 6-2,6-7,6-1 |
| ITF M25 La Nucia | 2023/05/31 09:35 | Ryan Nijboer v Noah Regas | 6-2,6-0 |
| ITF M25 La Nucia | 2023/05/30 08:00 | Ryan Nijboer v Alberto A Fernandez | 6-0,6-1 |
| ITF M15 Bukurešť | 2023/05/26 10:10 | Petr Nesterov v Ryan Nijboer | 7-5,6-2 |
| ITF M15 Bukurešť | 2023/05/25 10:05 | Pedro Iamachkine v Ryan Nijboer | 5-7,3-6 |
| ITF M15 Bukurešť | 2023/05/24 09:25 | Vito Dell'Elba v Ryan Nijboer | 1-6,0-6 |
| ITF M15 Prijedor | 2023/05/18 08:45 | Ryan Nijboer v Petr Brunclik | 4-6,6-4,3-10 |
| ITF M25 Kursumlijska Banja | 2023/06/07 18:00 | Lautaro Midon v Niklas Schell | 6-3,6-4 |
| ITF M15 Kursumlijska Banja | 2023/06/01 08:55 | Martyn Pawelski v Niklas Schell | 6-3,6-3 |
| ITF M15 Kursumlijska Banja | 2023/05/31 07:00 | Niklas Schell v Johan A Rodriguez Rodriguez | 6-7,6-2,6-3 |
| ITF M15 Alaminos-Larnaca | 2023/05/12 08:00 | Sebastian Gima v Niklas Schell | 4-6,6-3,6-1 |
| ITF M15 Alaminos-Larnaca | 2023/05/11 08:00 | Niklas Schell v Vlad Andrei Dancu | 7-5,3-6,7-6 |
| ITF M15 Alaminos-Larnaca | 2023/05/10 09:45 | Aaron Cohen v Niklas Schell | 6-1,3-6,2-6 |
| ITF M15 Alaminos-Larnaca | 2023/05/04 07:40 | Sebastian Gima v Niklas Schell | 6-1,6-3 |
| ITF M15 Alaminos-Larnaca | 2023/05/03 10:00 | Niklas Schell v Edoardo Cherie Ligniere | 6-3,6-3 |