Ji Hee Choi defeated Hyun Hui Hong 6-2 6-0 in the Incheon 25K q32 on hard. The upset overturned the form book — Hyun Hui Hong came in leading the head-to-head 3–1. Ji Hee Choi narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-08 | Goyang $25K | QF | hard | Ji Hee Choi | 6-4 3-6 6-2 |
| 2014-05-26 | Changwon 25K | QF | hard | Hyun Hui Hong | 6-2 4-6 7-5 |
| 2012-05-21 | Changwon 25K | R32 | hard | Hyun Hui Hong | 6-0 7-6(6) |
| 2011-05-30 | Gimcheon 25K | Q32 | hard | Hyun Hui Hong | 6-3 6-1 |
Averages over each player's completed matches in the selected window (79 vs 1). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About