Ku Keon Kang defeated Jinseok Yoo 7-6 6-1 in the M25 Changwon 1 q64 on hard. The result followed the form book — Ku Keon Kang came in leading the head-to-head 1–0. Ku Keon Kang extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-06-05 | M25 Daegu 1 | Q16 | hard | Ku Keon Kang | 6-1 4-6 10-7 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.