Shiho Hisamatsu defeated Tomoko Yonemura 4-6 6-2 6-0 in the Ibaraki 10K round of 32 on hard. The upset overturned the form book — Tomoko Yonemura came in leading the head-to-head 5–3, but Shiho Hisamatsu had been the form player, winning 4 of their last 8 on hard. Shiho Hisamatsu narrowed the head-to-head to 5–4.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-04-19 | Changwon 25K | R32 | hard | Tomoko Yonemura | 6-3 6-1 |
| 2009-11-02 | Taipei 100K | R32 | hard | Tomoko Yonemura | 6-2 6-3 |
| 2009-04-27 | Gifu 50K | QF | carpet | Tomoko Yonemura | 6-2 6-3 |
| 2006-10-23 | Hamanako 25K | QF | carpet | Shiho Hisamatsu | 7-5 6-1 |
| 2005-11-07 | Shenzhen 50K | R32 | hard | Tomoko Yonemura | 6-2 4-6 6-3 |
| 2004-06-07 | Beijing 50K | R16 | hard | Tomoko Yonemura | 6-2 3-6 6-2 |
| 2003-10-13 | Haibara 25K | R16 | carpet | Shiho Hisamatsu | 6-4 6-1 |
| 2000-08-28 | Kugayama 10K | R16 | hard | Shiho Hisamatsu | 6-3 6-3 |
Averages over each player's completed matches in the selected window (3 vs 2). 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