Ji Sung Nam defeated Jung Woong Na 7-5 4-6 6-2 in the Korea F4 round of 16 on hard. Ji Sung Nam extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-17 | Korea F4 | QF | hard | Jung Woong Na | 7-5 2-6 6-3 |
| 2014-04-21 | Korea F1 | R16 | hard | Ji Sung Nam | 7-5 6-2 |
Averages over each player's completed matches in the selected window (163 vs 61). 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