Shiho Akita defeated Sakiko Shimizu 6-0 6-4 in the Pattaya 10K semi-final on hard. The upset overturned the form book — Sakiko Shimizu came in leading the head-to-head 1–0. Shiho Akita claimed a first win over Sakiko Shimizu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-28 | Hamanako 25K | R16 | carpet | Sakiko Shimizu | 7-5 2-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.