Ayaka Okuno defeated Riko Sawayanagi 3-6 6-4 6-2 in the Hamamatsu $25K qualifying round on grass. The upset overturned the form book — Riko Sawayanagi came in leading the head-to-head 1–0. Ayaka Okuno claimed a first win over Riko Sawayanagi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-04-28 | Aning 50K | Q16 | clay | Riko Sawayanagi | 6-4 6-3 |
Averages over each player's completed matches in the selected window (86 vs 82). 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