| 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 |
| UTR Pro Cardiff | 2023/02/24 08:00 | Alexander Okonkwo v Adam Kresina | 6-3,5-1 |
| ITF M15 Sarajevo | 2023/06/07 07:00 | Bozo Barun v Brandon Walkin | 4-6,2-6 |
| ITF M15 Sarajevo | 2023/06/06 07:25 | Andrej Krajcik v Bozo Barun | 2-6,2-6 |
| ITF M15 Sarajevo | 2023/06/05 07:00 | Bozo Barun v Maximilian Figl | 6-3,6-3 |
| ITF M15 Sarajevo | 2023/06/04 08:00 | Bozo Barun v Lucas Obeid | 6-4,7-6 |
| UTR Pro Winston-Salem | 2023/01/13 17:46 | Charles Bertimon v Bozo Barun | 7-5,7-6 |
| UTR Pro Winston-Salem | 2023/01/12 21:45 | Bozo Barun v Ronan Jachuck | 5-7,6-2,1-6 |
| UTR Pro Winston-Salem | 2023/01/10 21:55 | Bozo Barun v Saud Alhaqbani | 6-1,6-1 |
| UTR Pro Winston-Salem | 2023/01/09 19:00 | Bozo Barun v Welsh Hotard | 2-6,6-3,6-1 |