Chinami Ogi defeated Mari Tanaka 6-3 6-3 in the Miyazaki 10K round of 32 on carpet. The upset overturned the form book — Mari Tanaka came in leading the head-to-head 1–0. Chinami Ogi claimed a first win over Mari Tanaka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-09-27 | Hamanako 25K | R32 | carpet | Mari Tanaka | 3-6 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.