Di Zhao defeated Chin Wei Chan 6-3 6-2 in the Tsukuba 25K round of 16 on hard.
Zhao D. took it in straight sets.
Di Zhao beat Chin Wei Chan 6-3 6-2. Umpiry, "Di Zhao vs Chin Wei Chan — Tsukuba 25K Round of 16", https://umpiry.com/match/2013-08-26/chan-vs-zhao-tsukuba-25k-r16?utm_source=cite (as of 26 August 2013).