Erika Sema defeated Wen Hsin Hsu 6-2 6-4 in the Tsukuba 25K qualifying round on hard. The upset overturned the form book — Wen Hsin Hsu came in leading the head-to-head 2–1, but Erika Sema had been the form player, winning 3 of their last 6 on hard. Erika Sema narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-09-27 | Hamanako 25K | QF | carpet | Erika Sema | 4-6 7-6(3) 6-2 |
| 2010-09-06 | Noto 25K | R32 | carpet | Wen Hsin Hsu | 1-6 6-1 6-2 |
| 2009-05-25 | Gunma 25K | SF | carpet | Wen Hsin Hsu | 6-0 7-5 |
Averages over each player's completed matches in the selected window (199 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