Sept. 10 (UPI) -- Second-seeded Dominic Thiem became the first Austrian player to clinch a spot in a U.S. Open semifinal with a straight-sets victory over Alex de Minaur in the quarterfinals of the Grand Slam in Queens, N.Y.
Thiem fired 11 aces in the two-hour, four-minute triumph Wednesday at Arthur Ashe Stadium inside the USTA Billie Jean King National Tennis Center.