Wen Hsin Hsu defeated Tomoko Yonemura 7-5 5-7 6-2 in the Tsukuba 25K round of 32 on hard. The upset overturned the form book — Tomoko Yonemura came in leading the head-to-head 3–0. Wen Hsin Hsu claimed a first win over Tomoko Yonemura in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-10-04 | Tokyo 100K | R32 | hard | Tomoko Yonemura | 6-2 6-1 |
| 2010-08-30 | Tsukuba 25K | R32 | hard | Tomoko Yonemura | 6-2 7-5 |
| 2004-08-30 | Saitama 10K | SF | hard | Tomoko Yonemura | 6-0 6-0 |
Averages over each player's completed matches in the selected window (2 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. Small sample — read as indicative. About