Ying Ying Duan defeated Kai Chen Chang 7-5 6-4 in the Shenzhen $25K qualifying round on hard.
Duan Y. took it in straight sets.
Ying Ying Duan beat Kai Chen Chang 7-5 6-4. Umpiry, "Ying Ying Duan vs Kai Chen Chang — Shenzhen $25K Qualifying Round", https://umpiry.com/match/2015-04-20/chang-vs-duan-shenzhen-25k-qf?utm_source=cite (as of 20 April 2015).