Seong Gook Oh defeated Kwi Tai Kim 7-5 6-4 in the Korea F4 q16 on hard. The result followed the form book — Seong Gook Oh came in leading the head-to-head 2–0. Seong Gook Oh extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-31 | Korea F6 | Q32 | clay | Seong Gook Oh | 6-4 6-4 |
| 2013-04-29 | Korea F1 | Q32 | hard | Seong Gook Oh | 7-6(7) 0-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.