Mari Tanaka defeated Tomoko Dokei 6-2 6-4 in the Niigata 10K 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 |
|---|---|---|---|---|---|
| 2008-07-14 | Miyazaki 25K | R32 | carpet | Mari Tanaka | 7-5 6-7(6) 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.