Mari Tanaka defeated Mi Yoo 7-6 6-2 in the Kofu 10K qualifying round on hard. The result followed the form book — Mari Tanaka came in leading the head-to-head 2–1. Mari Tanaka extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-06-29 | Gimcheon 10K | QF | hard | Mari Tanaka | 6-2 6-0 |
| 2005-07-11 | Seogwipo 10K | QF | hard | Mi Yoo | 6-1 6-4 |
| 2004-09-13 | Kyoto 10K | R32 | carpet | Mari Tanaka | 2-6 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.