Cheong Eui Kim defeated Yunseong Chung 7-5 7-6 in the Korea F4 qualifying round on hard. The result followed the form book — Cheong Eui Kim came in leading the head-to-head 3–0. Cheong Eui Kim extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-12-05 | Indonesia F5 | R32 | hard | Cheong Eui Kim | 6-2 5-7 7-5 |
| 2015-04-13 | China F3 | QF | clay | Cheong Eui Kim | 5-7 7-6(2) 6-4 |
| 2014-06-16 | Korea F6 | F | hard | Cheong Eui Kim | 6-2 6-4 |
Averages over each player's completed matches in the selected window (121 vs 200). 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. About