Yannick Mertens defeated Ti Chen 6-4 7-5 in the Qatar F1 semi-final on hard.
Mertens Y. took it in straight sets.
Yannick Mertens beat Ti Chen 6-4 7-5. Umpiry, "Yannick Mertens vs Ti Chen — Qatar F1 Semi-final", https://umpiry.com/match/2014-03-31/chen-vs-mertens-qatar-f1-sf?utm_source=cite (as of 31 March 2014).