Stadium: Court 2 Round: 54 Ground: Clay
| Challenger Champaign | 2023/11/13 20:00 | Oliver Okonkwo v Hunter Heck | 6-7,2-6 |
| Challenger Champaign | 2023/11/12 23:10 | Christian Harrison v Oliver Okonkwo | 4-6,6-3,6-7 |
| ITF M15 Champaign | 2023/09/14 19:35 | Oliver Okonkwo v Patrick Maloney | 3-6,1-6 |
| ITF M15 Champaign | 2023/09/13 23:15 | Oliver Okonkwo v Facundo Yunis | 6-1,4-6,6-1 |
| ITF M25 Decatur | 2023/08/03 13:55 | Shunsuke Mitsui v Oliver Okonkwo | 7-6,6-4 |
| ITF M25 Decatur | 2023/08/01 16:05 | Oliver Okonkwo v Semen Pankin | 6-2,1-6,10-8 |
| ITF M25 Edwardsville | 2023/07/24 14:00 | Kenta Miyoshi v Oliver Okonkwo | 6-3,6-4 |
| ITF M25 Champaign | 2023/07/18 14:55 | Perry Gregg v Oliver Okonkwo | 3-6,6-2,10-7 |
| ITF M15 Palm Coast | 2024/02/13 15:00 | Thomas Brown v Nicolas Kobelt | 6-7,6-1,12-10 |
| ITF M15 Palm Coast | 2024/02/12 15:00 | Alexander Frusina v Nicolas Kobelt | 7-6,5-7,9-11 |
| UTR Pro Knoxville | 2023/12/09 17:00 | Nicolas Kobelt v Joubert Klopper | 6-1,4-6,2-6 |
| UTR Pro Knoxville | 2023/12/08 19:00 | Teddy Truwit v Nicolas Kobelt | 3-6,1-6 |
| UTR Pro Knoxville | 2023/12/07 20:00 | Johannus Monday v Nicolas Kobelt | 6-3,5-2 |
| UTR Pro Knoxville | 2023/12/06 21:30 | Sabi Roi v Nicolas Kobelt | 4-6,6-7 |
| UTR Pro Knoxville | 2023/12/04 21:30 | Vincent Rettke v Nicolas Kobelt | 6-3,1-6,1-6 |
| ITF M15 Limassol | 2023/11/28 10:30 | Nicolas Kobelt v Millen Hurrion | 6-7,3-6 |