Su Jeong Jang defeated Seo Kyung Kang 7-6 6-2 in the Seoul 25K round of 32 on hard. The upset overturned the form book — Seo Kyung Kang came in leading the head-to-head 1–0. Su Jeong Jang claimed a first win over Seo Kyung Kang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-17 | Sunchang 10K | R32 | hard | Seo Kyung Kang | 6-1 6-4 |
Averages over each player's completed matches in the selected window (200 vs 1). 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. Small sample — read as indicative. About