Wen Hsin Hsu defeated Chinami Ogi 6-2 6-3 in the Karuizawa 25K round of 16 on carpet. The upset overturned the form book — Chinami Ogi came in leading the head-to-head 1–0. Wen Hsin Hsu claimed a first win over Chinami Ogi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-25 | Gifu 50K | QF | hard | Chinami Ogi | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.