Stadium: Center Court Round: 14 Ground: Hardcourt outdoor
| Challenger Busan | 2023/05/09 02:00 | Ji Sung Nam v Gabriel Diallo | 3-6,3-6 |
| Challenger Gwangju | 2023/05/01 01:30 | Dominik Palan v Ji Sung Nam | 6-4,6-3 |
| Challenger Gwangju | 2023/04/30 01:30 | Ji Sung Nam v Ajeet Rai | 5-7,6-1,6-2 |
| Challenger Seoul | 2023/04/26 02:00 | Max Purcell v Ji Sung Nam | 6-3,6-4 |
| Challenger Seoul | 2023/04/24 02:00 | Ji Sung Nam v Shinji Hazawa | 6-2,6-4 |
| Challenger Seoul | 2023/04/23 02:00 | Hiroki Moriya v Ji Sung Nam | 2-6,2-6 |
| Challenger Madrid | 2023/04/09 09:00 | Ji Sung Nam v Viktor Durasovic | 6-4,6-7,6-7 |
| Challenger Murcia | 2023/04/03 09:00 | Ji Sung Nam v Edas Butvilas | 6-2,3-6,1-6 |
| Challenger Tyler | 2023/06/06 16:35 | Gustavo Heide v Alexis Galarneau | 4-6,2-6 |
| Challenger Tyler | 2023/06/05 19:50 | Gustavo Heide v Ernesto Escobedo | 7-5,3-6,7-6 |
| Challenger Tyler | 2023/06/04 21:00 | Maks Kasnikowski v Gustavo Heide | 6-7,3-6 |
| Challenger Little Rock | 2023/05/28 17:00 | Christian Langmo v Gustavo Heide | 6-2,4-6,6-3 |
| Challenger Coquimbo | 2023/05/03 14:00 | Gustavo Heide v Facundo Juarez | 5-7,3-6 |
| Challenger Coquimbo | 2023/05/01 15:50 | Juan Bautista Torres v Gustavo Heide | 1-6,5-7 |
| Challenger Buenos Aires | 2023/04/27 19:20 | Roman Andres Burruchaga v Gustavo Heide | 6-1,6-2 |
| Challenger Buenos Aires | 2023/04/25 17:50 | Gustavo Heide v Mariano Kestelboim | 6-4,6-3 |