Shiho Hisamatsu defeated Yoon Jeong Cho 7-5 7-6 in the Augusta GA 25K round of 32 on hard. The upset overturned the form book — Yoon Jeong Cho came in leading the head-to-head 2–0, but Shiho Hisamatsu had been the form player, winning 4 of their last 8 on hard. Shiho Hisamatsu claimed a first win over Yoon Jeong Cho in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-11-15 | Nuriootpa 25K | SF | hard | Yoon Jeong Cho | 7-6(3) 6-3 |
| 2001-09-10 | Seoul 50K | QF | hard | Yoon Jeong Cho | 6-3 7-6(3) |
Averages over each player's completed matches in the selected window (3 vs 11). 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