Stadium: Court 1 Round: 19 Ground: Hardcourt indoor
| Challenger Champaign | 2023/11/12 23:10 | 하리슨, 크리스티안 v Okonkwo, Oliver | 4-6,6-3,6-7 |
| ITF M15 Champaign | 2023/09/14 19:35 | Okonkwo, Oliver v Maloney, Patrick | 3-6,1-6 |
| ITF M15 Champaign | 2023/09/13 23:15 | Okonkwo, Oliver v Yunis, Facundo | 6-1,4-6,6-1 |
| ITF M25 Decatur | 2023/08/03 13:55 | 미츠이, 순수케 v Okonkwo, Oliver | 7-6,6-4 |
| ITF M25 Decatur | 2023/08/01 16:05 | Okonkwo, Oliver v Pankin, Semen | 6-2,1-6,10-8 |
| 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 |
| Challenger Champaign | 2023/11/13 00:20 | 헤크, 헌터 v 클라크, 에제키엘 | 7-5,6-0 |
| ITF M15 Champaign | 2023/09/15 17:40 | 그란트, 윌리암 v 헤크, 헌터 | 7-6,6-1 |
| ITF M15 Champaign | 2023/09/14 15:00 | 헤크, 헌터 v 네프베, 악셀 | 6-2,6-4 |
| ITF M15 Champaign | 2023/09/12 20:30 | 헤크, 헌터 v 펜티, 안드루 | 7-5,7-6 |
| ITF M25 Decatur | 2023/08/05 17:50 | 한즐릭, 캐쉬 v 헤크, 헌터 | 6-2,6-1 |
| ITF M25 Decatur | 2023/08/04 14:00 | 헤크, 헌터 v 클라크, 에제키엘 | 6-1,6-0 |
| ITF M25 Decatur | 2023/08/03 19:50 | 미츠이, 순수케 v 헤크, 헌터 | 0-6,2-6 |
| ITF M25 Edwardsville | 2023/07/26 18:35 | 헤크, 헌터 v Michael Zheng | 6-4,4-6,2-6 |