Ying Ying Duan defeated Chiaki Okadaue 6-3 6-1 in the Gifu 50K round of 32 on hard. The result followed the form book — Ying Ying Duan came in leading the head-to-head 1–0. Ying Ying Duan extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-17 | Pingguo 25K | R32 | hard | Ying Ying Duan | 6-3 6-3 |
Averages over each player's completed matches in the selected window (156 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