|At Olympic Park Tennis Centre|
|Purse: Men, $468,910 (WT250); Women, $733,900 (Premier)|
Daniil Medvedev, Russia, def. Fabio Fognini (4), Italy, 2-6, 6-4, 6-1.
Alex de Minaur, Australia, def. Benoit Paire, France, 4-6, 6-1, 6-1.
Ashleigh Barty, Australia, def. Daria Gavrilova, Australia, 3-6, 6-4, 6-2.
Angelique Kerber, Australia, def. Camila Giorgi, Italy, 6-2, 6-3.
Lukasz Kubot, Poland, and Marcelo Melo (1), Brazil, def. Jan-Lennard Struff, Germany, and Viktor Troicki, Serbia, 6-3, 6-4.
Gabriela Dabrowski, Canada, and Xu Yifan (3), China, def. Latisha Chan, Taiwan, and Andrea Sestini Hlavackova (1), Czech Republic, 6-4, 5-2 retired.