Chiaki Okadaue defeated Akari Inoue 6-3 6-3 in the Nishi Tama 10K qualifying round on hard. The upset overturned the form book — Akari Inoue came in leading the head-to-head 4–0. Chiaki Okadaue claimed a first win over Akari Inoue in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-18 | Karuizawa $25K | R32 | grass | Akari Inoue | 6-3 3-6 7-6(9) |
| 2014-06-02 | Tokyo 10K | R32 | hard | Akari Inoue | 6-1 6-3 |
| 2012-09-10 | Salisbury 10K | R32 | hard | Akari Inoue | 6-4 2-6 6-4 |
| 2007-04-30 | Gifu 50K | R16 | carpet | Akari Inoue | 6-2 6-4 |
Averages over each player's completed matches in the selected window (2 vs 13). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About