Yurika Sema defeated Chiaki Okadaue 6-3 6-2 in the Obihiro 25K round of 16 on carpet. The upset overturned the form book — Chiaki Okadaue came in leading the head-to-head 2–0. Yurika Sema claimed a first win over Chiaki Okadaue in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-31 | Burnie 25K | R32 | hard | Chiaki Okadaue | 6-1 5-7 6-2 |
| 2007-04-30 | Gifu 50K | R32 | carpet | Chiaki Okadaue | 7-5 6-3 |
Averages over each player's completed matches in the selected window (11 vs 2). 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