| UTR Pro London | 2023/05/16 11:30 | Oliver Okonkwo v Andres Gabriel Ciurletti | 0-6,6-2,6-5 |
| UTR Pro London | 2023/05/15 07:00 | Adam Jones v Oliver Okonkwo | 6-7,3-6 |
| Challenger Champaign | 2022/11/14 00:25 | Oliver Okonkwo v Inaki Montes-De La Torre | 1-6,3-6 |
| ITF M15 Champaign | 2022/09/14 17:30 | Oliver Okonkwo v Gianni Ross | 3-6,6-4,1-6 |
| ITF M15 South Bend | 2022/06/21 12:30 | Ronan Jachuck v Oliver Okonkwo | 7-6,6-2 |
| ITF M15 South Bend | 2022/06/20 13:00 | Oliver Okonkwo v Zachary Mintz | 6-2,6-0 |
| ITF M25 Iowa City | 2019/07/16 19:00 | Oliver Okonkwo v Mohamed Aziz Dougaz | 6-7,4-6 |
| UTR Pro London | 2023/05/15 07:00 | Ben Hudson v Kabeer Kapasi | 3-6,3-6 |