Su Jeong Jang defeated Yurina Koshino 3-6 7-6 7-5 in the Incheon 25K q32 on hard. The result followed the form book — Su Jeong Jang came in leading the head-to-head 2–0. Su Jeong Jang extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-07-30 | Beijing 75K | Q32 | hard | Su Jeong Jang | 3-6 6-4 6-2 |
| 2009-06-29 | Gimcheon 10K | R16 | hard | Su Jeong Jang | 6-0 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.