Dominic Thiem (5), Austria, def. Kevin Anderson (6), South Africa, 6-4, 6-2.

Alexander Zverev (2), Germany, def. Denis Shapovalov, Canada, 6-4, 6-1.

Petra Kvitova (10), Czech Republic, def. Kiki Bertens, Netherlands, 7-6 (6), 4-6, 6-3.

Bob and Mike Bryan (2), United States, def. Pierre-Hugues Herbert and Nicolas Mahut (4), France, 6-1, 7-6 (2).

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Nikola Mektic, Croatia, and Alexander Peya, Austria, def. Juan Sebastian Cabal and Robert Farah (6), Colombia, 6-3, 3-6, 10-3.

Ekaterina Makarova and Elena Vesnina (1), Russia, def. Timea Babos, Hungary, and Kristina Mladenovic (3), France, 2-6, 6-4, 10-8.