Ze Zhang defeated Steven Diez 6-1 6-2 in the Prague CH quarter-final on clay.
Zhang Z. took it in straight sets.
Ze Zhang beat Steven Diez 6-1 6-2. Umpiry, "Ze Zhang vs Steven Diez — Prague CH Quarter-final", https://umpiry.com/match/2014-06-09/diez-vs-zhang-prague-ch-qf?utm_source=cite (as of 9 June 2014).