Shiho Akita defeated Ying Ying Duan 6-2 6-4 in the Kofu 10K round of 16 on hard. The upset overturned the form book — Ying Ying Duan came in leading the head-to-head 1–0. Shiho Akita claimed a first win over Ying Ying Duan in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-11 | Incheon 25K | R16 | hard | Ying Ying Duan | 6-2 7-5 |
Averages over each player's completed matches in the selected window (200 vs 160). 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