Yu Chang defeated Pierre Hugues Herbert 6-4 6-1 in the China F1 round of 16 on hard.
Chang Y. took it in straight sets.
Yu Chang beat Pierre Hugues Herbert 6-4 6-1. Umpiry, "Yu Chang vs Pierre Hugues Herbert — China F1 Round of 16", https://umpiry.com/match/2012-01-02/chang-vs-herbert-china-f1-r16?utm_source=cite (as of 2 January 2012).