Stadium: Court 8 Round: 27 Ground: Clay
| ITF M15 Bukurešť | 2023/05/25 08:00 | Simon Beaupain v Petr Nesterov | 2-6,2-6 |
| ITF M15 Bukurešť | 2023/05/23 10:35 | Radu Mihai Papoe v Petr Nesterov | 1-6,6-3,3-6 |
| ITF M15 Kursumlijska Banja | 2023/05/04 11:40 | Maks Kasnikowski v Petr Nesterov | 7-6,6-1 |
| ITF M15 Kursumlijska Banja | 2023/05/03 13:05 | Petr Nesterov v Rrezart Cungu | 6-0,6-3 |
| ITF M15 Kursumlijska Banja | 2023/04/27 08:45 | Mili Poljicak v Petr Nesterov | 6-3,6-1 |
| ITF M15 Kursumlijska Banja | 2023/04/26 07:00 | Admir Kalender v Petr Nesterov | 2-6,6-7 |
| UTR Pro Bělehrad | 2023/04/21 08:46 | Christos Keisidis v Petr Nesterov | 3-6,4-0 |
| UTR Pro Bělehrad | 2023/04/20 06:00 | Radomir Tomic v Petr Nesterov | 6-3,0-6,7-5 |
| 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 M15 Doboj | 2023/05/13 07:30 | Marat Sharipov v Ryan Nijboer | 6-1,6-3 |
| ITF M15 Doboj | 2023/05/12 07:00 | Kirill Mishkin v Ryan Nijboer | 2-6,0-6 |
| ITF M15 Doboj | 2023/05/10 08:00 | Gabriele Maria Noce v Ryan Nijboer | 4-6,1-6 |
| Challenger Řím | 2023/04/24 10:05 | Ryan Nijboer v Alexander Weis | 4-6,6-3,2-6 |
| Challenger Řím | 2023/04/23 13:15 | Stefano Travaglia v Ryan Nijboer | 6-7,6-2,5-7 |