|A U.S. Open Series event|
|At The Lindner Family Tennis Center|
|Purse: Men, $5.67 million (Masters 1000); Women, $2.87 million (Premier)|
Novak Djokovic (10), Serbia, def. Marin Cilic (7), Croatia, 6-4, 3-6, 6-3.
Kiki Bertens, Netherlands, def. Petra Kvitova (8), Czech Republic, 3-6, 4-6, 6-2.
Simona Halep (1), Romania, def. Aryna Sabalenka, Belarus, 6-3, 6-4.
Jamie Murray, Britain, and Bruno Soares (4), Brazil, def. Lukasz Kubot, Poland, and Mercelo Melo (5), Brazil, 7-5, 6-7 (6), 10-6
Philipp Kohlschreiber, Germany, and Fernando Verdasco, Spain, def. Henri Kontinen, Finland, and John Peers (3), Australia, 2-6, 7-6 (2), 10-7.
Jean-Julien Rojer, Netherlands, and Horia Tecau (6), Hungary, def. Feliciano and Marc Lopez, Spain, 6-3, 7-5.
Juan Sebastian Cabal and Robert Farah (7), Colombia, def. Nikola Mektic, Croatia, and Alexander Peya, Austria, walkover.
Anastasia Pavlyuchenkova, Russia, and Anastasija Sevastova, Latvia, def. Lucie Hradecka, Czech Republic, and Ekaterina Makarova (7), Russia, 6-3, 6-3.
Elise Mertens, Belgium, and Demi Schuurs (6), Netherlands, def. Kaitlyn Christian and Sabrina Santamaria, United States, 6-1, 6-4.