Serena Williams (USA) [1] - Bethanie Mattek-Sands (USA)
Madison Keys (USA) [19] - Agnieszka Radwanska (POL) [15]
Belinda Bencic (SUI) [12] - Venus Williams (USA) [23]
Anett Kontaveit (EST) [q] - Madison Brengle (USA)
Daria Kasatkina (RUS) [LL] - Kristina Mladenovic (FRA)
Elina Svitolina (UKR) [17] - Ekaterina Makarova (RUS) [13]
Roberta Vinci (ITA) - Mariana Duque-Marino (COL)
Eugenie Bouchard (CAN) [25] - Dominika Cibulkova (SVK)