Chinami Ogi defeated Yuuki Tanaka 6-3 6-3 in the Gifu 50K qualifying round on hard. The upset overturned the form book — Yuuki Tanaka came in leading the head-to-head 3–0. Chinami Ogi claimed a first win over Yuuki Tanaka in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-13 | Kurume 50K | QF | grass | Yuuki Tanaka | 6-1 6-0 |
| 2012-09-10 | Kyoto 10K | QF | carpet | Yuuki Tanaka | 6-2 6-4 |
| 2010-08-02 | Niigata 10K | R16 | carpet | Yuuki Tanaka | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.