Mari Tanaka defeated Aki Yamasoto 6-3 6-3 in the Hamanako 25K round of 32 on carpet. The result followed the form book — Mari Tanaka came in leading the head-to-head 1–0. Mari Tanaka extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-06-11 | Tokyo 10K | QF | hard | Mari Tanaka | 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.