Riko Sawayanagi defeated Ayaka Okuno 6-4 6-3 in the Aning 50K q16 on clay. The upset overturned the form book — Ayaka Okuno came in leading the head-to-head 1–0. Riko Sawayanagi claimed a first win over Ayaka Okuno in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-10-19 | Hamamatsu $25K | QF | grass | Ayaka Okuno | 3-6 6-4 6-2 |
Averages over each player's completed matches in the selected window (86 vs 86). 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