Kai Chen Chang defeated Tamarine Tanasugarn 6-3 6-4 in the TPE vs THA round robin on hard. The upset overturned the form book — Tamarine Tanasugarn came in leading the head-to-head 3–1, but Kai Chen Chang had been the form player, winning 6 of their last 10 on hard. Kai Chen Chang narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-11-17 | Toyota 75K | R16 | carpet | Tamarine Tanasugarn | 6-2 1-6 6-4 |
| 2012-02-06 | Pattaya | R16 | hard | Tamarine Tanasugarn | 7-6 6-3 |
| 2010-10-11 | Osaka | QF | hard | Tamarine Tanasugarn | 6-3 2-6 6-4 |
| 2009-10-12 | Osaka | R32 | hard | Kai Chen Chang | 7-5 6-1 |
Averages over each player's completed matches in the selected window (120 vs 18). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About