WASHINGTON – Australian Nick Kyrgios blasted 15 aces to blow past Japan's Yoshihito Nishioka 6-2 7-5 on Thursday and reach the quarterfinals at the Citi Open in Washington, D.C.
Kyrgios was dominant on serve as he enjoyed his least stressful match of the tournament thus far. He was broken on service just once by Nishioka and won 85 percent of his first serves.
Playing in his first tournament since his testy second round loss to Rafa Nadal at Wimbledon, Kyrgios will next face unseeded Slovakian Norbert Gombos.
Top-seeded Stefanos Tsitsipas of Greece overcame an uneven performance to take down Australian Jordan Thompson 6-3 7-6(4).
Tsitsipas trailed 5-4 in the second set but climbed out with some timely serves to ultimately prevail.