Ayaka Okuno defeated Makoto Ninomiya 6-3 6-1 in the Japan Open Tokyo qualifying round 1 on hard. The upset overturned the form book — Makoto Ninomiya came in leading the head-to-head 1–0, but Ayaka Okuno had been the form player, winning 3 of their last 6 on hard. Ayaka Okuno claimed a first win over Makoto Ninomiya in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-18 | Karuizawa $25K | R16 | grass | Makoto Ninomiya | 6-2 4-6 6-3 |
Averages over each player's completed matches in the selected window (84 vs 25). 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