Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| 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 Murcia | 2023/04/02 09:00 | Daniel Rincon v Ji Sung Nam | 3-6,2-6 |
| Challenger Gwangju | 2023/05/01 08:05 | Rinky Hijikata v Gabriel Diallo | 6-2,6-4 |
| Challenger Seoul | 2023/04/27 06:45 | Gabriel Diallo v Christopher Eubanks | 6-2,3-6,2-6 |
| Challenger Seoul | 2023/04/24 06:45 | Gabriel Diallo v Yu Hsiou Hsu | 6-2,6-3 |
| Challenger Sarasota | 2023/04/12 19:20 | Gabriel Diallo v Mitchell Krueger | 6-2,6-4 |
| Challenger Sarasota | 2023/04/11 17:00 | Facundo Diaz Acosta v Gabriel Diallo | 6-3,2-6,6-7 |
| Challenger Lille | 2023/03/31 16:35 | Gabriel Diallo v Jurij Rodionov | 6-2,5-7,1-6 |
| Challenger Lille | 2023/03/30 17:00 | Gabriel Diallo v Ricardas Berankis | 6-3,7-5 |
| Challenger Lille | 2023/03/29 11:15 | Hugo Grenier v Gabriel Diallo | 6-4,4-6,2-6 |