The women's field has opened up after top-seeded Sloane Stephens and Wimbledon breakout star Coco Gauff were knocked out. Also Thursday, fourth-seeded Hsieh Su-wei edged Varvara Gracheva 7-5, 4-6, 7-6 (6); Zarina Diyas beat fifth-seeded Lesia Tsurenko 6-4, 6-4; and Camila Giorgi rallied to beat Rebecca Peterson 3-6, 6-3, 6-4.
On the men's side, top-seeded Stefanos Tsitsipas of Greece beat Jordan Thompson 6-3, 7-6 (4). Tenth-seeded Benoit Paire knocked out fifth-seeded American John Isner 7-6 (3), 6-3. Sixth-seeded Marin Cilic topped ninth-seeded Felix Auger-Aliassime 6-3, 6-4 to set up a match against Nick Kyrgios, a 6-2, 7-5 winner over Yoshihito Nishioka.
Britain's Kyle Edmund came back to beat Jo-Wilfried Tsonga 3-6, 6-3, 6-4. Third-seeded Daniil Medvedev beat American Frances Tiafoe 6-2, 7-5.
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