Mari Tanaka defeated Sakiko Shimizu 6-4 7-6 in the Pattaya 10K round of 32 on hard. Mari Tanaka extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-31 | Komoro 10K | R32 | clay | Sakiko Shimizu | 7-6(2) 6-4 |
| 2007-08-13 | Tokyo 10K | QF | carpet | Mari Tanaka | 6-4 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.