Chiaki Okadaue defeated Sakiko Shimizu 6-7 6-1 7-6 in the Obihiro 25K round of 32 on carpet. The result followed the form book — Chiaki Okadaue came in leading the head-to-head 1–0. Chiaki Okadaue extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-17 | Karuizawa 25K | R32 | carpet | Chiaki Okadaue | 7-6(6) 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.