| UTR Pro Arkansas | 2023/09/18 20:14 | Volodymyr Zakharov v Evan Bynoe | 1-6,0-6 |
| UTR Pro Tennis Series Texas | 2022/08/17 16:30 | Aron Pierce v Volodymyr Zakharov | 6-3,6-7,6-1 |
| UTR Pro Tennis Series Texas | 2022/08/16 18:00 | Liam Krall v Volodymyr Zakharov | 6-1,6-3 |
| UTR Pro Tennis Series Texas | 2022/08/15 16:30 | Volodymyr Zakharov v Savan Chhabra | 6-3,6-7,1-6 |
| ITF M25 Tulsa | 2022/06/21 13:30 | Volodymyr Zakharov v George Goldhoff | 3-6,3-6 |
| ITF M25 Tulsa | 2022/06/20 13:30 | Marcus Walters v Volodymyr Zakharov | 3-6,6-2,2-10 |
| UTR Pro Arkansas | 2023/09/18 19:30 | Alexander Okonkwo v Bozo Barun | 6-4,7-5 |
| UTR Pro Easton | 2023/04/08 08:00 | Yujiro Onuma v Alexander Okonkwo | 7-6,6-0 |
| UTR Pro Easton | 2023/04/06 10:00 | Alexander Okonkwo v Ali Habib | 5-7,6-2,6-3 |
| UTR Pro Easton | 2023/04/05 07:00 | Alexander Okonkwo v Michael Shaw | 5-7,6-0,2-6 |
| UTR Pro Easton | 2023/04/04 11:30 | David Quayle v Alexander Okonkwo | 6-4,6-0 |
| UTR Pro Easton | 2023/04/03 08:30 | Hien Q H Pham v Alexander Okonkwo | 6-7,3-6 |
| UTR Pro Cardiff | 2023/02/26 10:30 | William Mclennaghan v Alexander Okonkwo | 7-6,6-3 |
| UTR Pro Cardiff | 2023/02/25 08:00 | Alexander Okonkwo v Robert Beznea | 6-0,6-1 |