Ying Ying Duan defeated Shiho Akita 6-2 7-5 in the Incheon 25K round of 16 on hard. The upset overturned the form book — Shiho Akita came in leading the head-to-head 1–0. Ying Ying Duan claimed a first win over Shiho Akita in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-23 | Kofu 10K | R16 | hard | Shiho Akita | 6-2 6-4 |
Averages over each player's completed matches in the selected window (160 vs 43). 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