Sung Keun Jeong defeated Hyeong Jin Cho 6-3 1-6 6-2 in the Korea F3 qualifying round of 32 on hard. The result followed the form book — Sung Keun Jeong came in leading the head-to-head 2–1. Sung Keun Jeong extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-24 | Korea F5 | Q64 | hard | Hyeong Jin Cho | 7-5 2-1 |
| 2014-08-18 | Korea F11 | Q32 | clay | Sung Keun Jeong | 7-5 6-0 |
| 2014-08-11 | Korea F10 | Q64 | hard | Sung Keun Jeong | 6-1 4-6 7-6(6) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.