Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Edwardsville | 2023/07/24 14:00 | Miyoshi, Kenta v Okonkwo, Oliver | 6-3,6-4 |
| ITF M25 Champaign | 2023/07/18 14:55 | Gregg, Perry v Okonkwo, Oliver | 3-6,6-2,10-7 |
| ITF M15 South Bend | 2023/06/21 17:05 | Adhithya Ganesan v Okonkwo, Oliver | 6-0,6-3 |
| ITF M15 South Bend | 2023/06/20 15:00 | 베르날드, 존 v Okonkwo, Oliver | 2-6,4-6 |
| ITF M15 South Bend | 2023/06/19 14:00 | Okonkwo, Oliver v Sean Daryabeigi | 3-6,6-3,13-11 |
| UTR Pro London | 2023/05/20 10:16 | Petrovic, Luka v Okonkwo, Oliver | 6-4,6-4 |
| UTR Pro London | 2023/05/19 07:00 | Okonkwo, Oliver v Ben Hudson | 6-3,5-4 |
| UTR Pro London | 2023/05/17 08:30 | Okonkwo, Oliver v Kabeer Kapasi | 6-2,6-1 |
| ITF M25 Decatur | 2023/07/31 14:00 | 나잠, 사얀 v Pankin, Semen | 1-6,0-6 |
| ITF M15 Pittsburgh | 2023/07/25 14:00 | Dickerson, Ryan v Pankin, Semen | 6-1,6-1 |
| ITF M15 South Bend | 2023/06/22 16:00 | Aidan Kim v Pankin, Semen | 7-5,6-3 |
| ITF M15 South Bend | 2023/06/21 21:30 | Pankin, Semen v Nil Giraldez | 6-4,7-5 |
| ITF M15 South Bend | 2023/06/20 15:00 | Pankin, Semen v Sasha Trkulja | 7-5,6-2 |
| ITF M15 South Bend | 2023/06/19 14:00 | Morandais, Jean-Christian v Pankin, Semen | 5-7,6-4,2-10 |
| ITF M25 Calabasas | 2023/03/20 18:00 | Pankin, Semen v Cooper Williams | 6-7,2-6 |
| ITF Russia F5 Qual | 2018/08/06 09:05 | 루디우코브, 일리아 v Pankin, Semen | 3-6,6-4,6-4 |