Alex de Minaur, Australia, def. Gilles Simon (4), France, 6-3, 6-2.

Alex de Minaur, Australia, def. Andreas Seppi (8), Italy, 7-5, 7-6 (5).

Petra Kvitova (5), Czech Republic, def. Ashleigh Barty, Australia, 1-6, 7-5, 7-6 (3).

Jamie Murray, Britain, and Bruno Soares (2), Brazil, def. Juan Sebastian Cabal and Robert Farah (1), Colombia, 6-4, 6-3.

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Aleksandra Krunic, Serbia, and Katerina Siniakova, Czech Republic, def. Eri Hozumi, Japan, and Alicja Rosolska, Poland, 6-1, 7-6 (3).