Estádio: Center Court Round: 25 Ground: Hardcourt outdoor
| Challenger Columbus | 2021/09/21 14:00 | Yunseong Chung v Ji Sung Nam | 6-3,4-6,6-7 |
| ITF - Coreia F3 | 2018/06/24 05:00 | Yunseong Chung v Ji Sung Nam | 6-1,6-3 |
| ITF - Coreia F2 | 2018/06/17 04:00 | Ji Sung Nam v Yunseong Chung | 4-6,3-6 |