Chiaki Okadaue defeated Wen Hsin Hsu 6-0 6-2 in the Kurume 50K qualifying round of 32 on grass. The upset overturned the form book — Wen Hsin Hsu came in leading the head-to-head 3–0. Chiaki Okadaue claimed a first win over Wen Hsin Hsu in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-11-19 | Toyota 75K | Q32 | carpet | Wen Hsin Hsu | 6-3 4-6 6-1 |
| 2011-04-25 | Gifu 50K | R32 | hard | Wen Hsin Hsu | 6-7(5) 7-5 6-4 |
| 2009-06-01 | Komoro 25K | R16 | clay | Wen Hsin Hsu | 6-1 6-4 |
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. About