Sakiko Shimizu defeated Kana Watanabe 6-1 6-2 in the Hiroshima 10K round of 32 on carpet. The upset overturned the form book — Kana Watanabe came in leading the head-to-head 1–0. Sakiko Shimizu claimed a first win over Kana Watanabe in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-13 | Miyazaki 10K | R16 | carpet | Kana Watanabe | 6-4 6-4 |