Shiho Hisamatsu defeated Akiko Yonemura 6-2 3-6 7-5 in the Ibaraki 25K final on hard. The upset overturned the form book — Akiko Yonemura came in leading the head-to-head 3–0. Shiho Hisamatsu claimed a first win over Akiko Yonemura in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-04-26 | Gifu 50K | R32 | hard | Akiko Yonemura | 6-1 6-1 |
| 2008-05-05 | Fukuoka 50K | R32 | grass | Akiko Yonemura | 5-7 7-5 6-4 |
| 2005-10-17 | Makinohara 25K | R32 | carpet | Akiko Yonemura | 7-5 6-3 |
Averages over each player's completed matches in the selected window (3 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