| UTR Pro Copenhagen | 2023/02/14 10:00 | Wadym Konowczuk v Pierre, Hugo | 6-3,2-6,2-5 |
| UTR Pro Tennis Series Athens | 2022/08/14 05:00 | Wadym Konowczuk v Stefan Skobelev | 3-6,2-6 |
| UTR Pro Tennis Series Athens | 2022/08/13 05:00 | Ammar Elamin v Wadym Konowczuk | 6-2,2-6,4-6 |
| UTR Pro Tennis Series Athens | 2022/08/12 05:00 | Wadym Konowczuk v Tadija Radovanovic | 4-6,4-6 |
| UTR Pro Tennis Series Athens | 2022/08/11 06:30 | Wadym Konowczuk v Keisidis, Christos | 6-7,2-6 |
| UTR Pro Tennis Series Athens | 2022/08/09 09:00 | Denys Klok v Wadym Konowczuk | 6-3,6-2 |
| UTR Pro Tennis Series Athens | 2022/08/07 05:00 | Wadym Konowczuk v Athanasios Spyropoulos | 4-6,2-6 |
| UTR Pro Tennis Series Athens | 2022/08/04 08:00 | Oumaouche, Rayane v Wadym Konowczuk | 6-2,5-2 |
| UTR Pro Copenhagen | 2023/02/13 12:45 | Sodan, Ivan v Jakub Ostajewski | 6-3,7-6 |
| ITF - M15 Palm Coast | 2023/02/06 16:30 | Jakub Ostajewski v Benjamin Denis Alarcon | 4-6,3-6 |
| ITF M25 - Wesley Chapel | 2023/01/23 14:45 | Thomas Brown v Jakub Ostajewski | 6-3,6-1 |
| ITF M25 Malibu | 2023/01/02 17:00 | Alex Kuperstein v Jakub Ostajewski | 7-6,6-2 |
| ITF M15 Boca Raton | 2022/11/14 16:00 | Sean Daryabeigi v Jakub Ostajewski | 6-2,6-3 |
| ITF M15 Winston-Salem | 2022/11/07 18:00 | Story, James v Jakub Ostajewski | 6-2,7-5 |
| ITF M15 Lubbock | 2022/09/21 17:05 | Jakub Ostajewski v Wojcik, Jakub | 4-6,4-6 |
| ITF M15 Lubbock | 2022/09/20 14:00 | Demulling, Wyatt v Jakub Ostajewski | 6-1,4-6,4-10 |