Hong Chung defeated Cheong Eui Kim 6-3 3-6 6-3 in the M15 Changwon 1 round of 16 on hard. The upset overturned the form book — Cheong Eui Kim came in leading the head-to-head 5–2. Hong Chung narrowed the head-to-head to 5–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-06-19 | Korea F4 | F | hard | Hong Chung | 6-1 6-3 |
| 2017-06-12 | Korea F3 | SF | hard | Cheong Eui Kim | 6-1 6-3 |
| 2017-05-29 | Korea F1 | QF | hard | Cheong Eui Kim | 6-3 6-7(5) 6-2 |
| 2016-06-13 | Korea F1 | R32 | hard | Cheong Eui Kim | 6-1 3-6 6-0 |
| 2015-08-24 | Korea F5 | QF | hard | Hong Chung | 6-3 2-6 7-5 |
| 2014-06-16 | Korea F6 | SF | hard | Cheong Eui Kim | 3-6 6-0 7-6(4) |
| 2013-05-20 | Korea F3 | R32 | hard | Cheong Eui Kim | 3-6 7-6(3) 7-6(2) |
Averages over each player's completed matches in the selected window (5 vs 12). 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