Kanae Hisami defeated Aki Yamasoto 7-6 4-6 6-2 in the Tokyo 1 10K round of 32 on hard. The upset overturned the form book — Aki Yamasoto came in leading the head-to-head 1–0, but Kanae Hisami had been the form player, winning 2 of their last 4 on hard. Kanae Hisami claimed a first win over Aki Yamasoto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-08-02 | Niigata 10K | QF | carpet | Aki Yamasoto | 3-6 7-6(4) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.