So Jung Kim defeated Akiko Yonemura 6-3 6-3 in the Gunma 25K qualifying round on carpet. So Jung Kim extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-05-21 | Nagano 25K | R16 | carpet | Akiko Yonemura | 6-2 4-6 6-1 |
| 2005-08-08 | Wuxi 25K | R32 | hard | So Jung Kim | 6-1 6-3 |
Averages over each player's completed matches in the selected window (5 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