Cheong Eui Kim defeated Ji Hoon Son 7-6 6-1 in the Korea F8 round of 16 on hard. The upset overturned the form book — Ji Hoon Son came in leading the head-to-head 2–0. Cheong Eui Kim claimed a first win over Ji Hoon Son in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-01-29 | Turkey F4 | R16 | clay | Ji Hoon Son | 6-4 6-4 |
| 2016-06-27 | Korea F3 | R16 | hard | Ji Hoon Son | 2-6 6-4 7-5 |
Averages over each player's completed matches in the selected window (196 vs 86). 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