Chan Yeong Oh defeated Hong Chung 6-4 7-5 in the M25 Changwon 1 round of 32 on hard. Chan Yeong Oh extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-06-07 | M25 Daegu 1 | R32 | hard | Hong Chung | 6-2 6-4 |
| 2017-06-05 | Korea F2 | R16 | hard | Chan Yeong Oh | 7-6(5) 3-6 6-3 |