Andreas Seppi (8), Italy, def. Diego Schwartzman (3), Argentina, 7-6 (3), 6-4.

Ashleigh Barty, Australia, def. Kiki Bertens (7), Netherlands, 6-7 (4), 6-4, 7-5.

Petra Kvitova (5), Czech Republic, def. Aliaksandra Sasnovich, Belarus, 6-1, 6-2.

Jamie Murray, Britain, and Bruno Soares (2), Brazil, def. Ken and Neal Skupski, Britain, 7-6 (4), 5-7, 10-7.

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Juan Sebastian Cabal and Robert Farah (1), Colombia, def. Lleyton Hewitt and Jordan Thompson, Australia, 7-6 (7), 7-5.

Aleksandra Krunic, Serbia, and Katerina Siniakova, Czech Republic, lead Eri Hozumi, Japan, and Alicja Rosolska, Poland, 6-1, 0-2, susp.