Marin Cilic (3), Croatia, def. Steve Johnson, United States, walkover.
Rafael Nadal (2), Spain, def. Yoshihito Nishioka, Japan, 7-6 (2), 6-3.
Christina McHale (5), United States, def. Monica Puig (4), Puerto Rico, 6-2, 6-2.
Kristina Mladenovic (2), France, def. Kirsten Flipkens, Belgium, 6-4, 6-3.
John Isner, United States, and Feliciano Lopez, Spain, def. Raven Klaasen, South Africa, and Rajeev Ram (2), United States, 6-2, 7-5.
Philipp Petzschner, Germany, and Aisam-ul-Haq Qureshi, Pakistan, def. Santiago Gonzalez, Mexico, and David Marrero, Spain, 6-4, 6-2.
Demi Schuurs, Netherlands, and Renata Voracova, Czech Republic, def. Eugenie Bouchard, Canada, and Kirsten Flipkens, Belgium, walkover.
Darija Jurak, Croatia, and Anastasia Rodionova (3), Australia, def. Madison Brengle and Nicole Gibbs, United States, 6-2, 2-6, 10-6.
Asia Muhammad and Taylor Townsend, United States, def. Danka Kovinic, Montenegro, and Alicja Rosolska, Poland, 6-2, 6-3.
This story has been automatically published from the Associated Press wire which uses US spellings