MEMPHIS, Tenn. (AP) Donald Young beat fellow American Reilly Opelka 7-6 (3), 6-3 on Wednesday to reach the Memphis Open quarterfinals.
Young held serve to force the first set to a tiebreaker before finishing off Opelka. Damir Dzumhur of Bosnia-Herzegovinia was the first to advance to the quarterfinals by upsetting seventh-seeded Steve Darcis of Belgium 7-6 (2), 6-4.
No. 2 seed John Isner, who received a bye into the second round, is set to play Japan's Yoshihito Nishioka on Wednesday night, while No. 3 seed Sam Querrey takes on fellow American Ryan Harrison in the final match of the night.
Nikoloz Basilashvili of Georgia beat Australia's Jordan Thompson 6-3, 6-0, and will play top-seeded Ivo Karlovic on Thursday. Mikhail Kukushkin of Kazakhstan downed Germany's Benjamin Becker 6-3, 6-4.