Serena Williams (1) (USA) v Margarita Gasparyan (RUS)
Timea Babos (HUN) v Petra Cetkovska (CZE)
Daniela Hantuchova (SVK) v Dominika Cibulkova (SVK)
Heather Watson (GBR) v Caroline Garcia (32) (FRA)
Sara Errani (19) (ITA) v Francesca Schiavone (ITA)
Aleksandra Krunic (SRB) v Roberta Vinci (ITA)
Marina Erakovic (NZL) v Yulia Putintseva (KAZ)
Madison Brengle (USA) v Venus Williams (16) (USA)
Carla Suarez Navarro (9) (ESP) v Jelena Ostapenko (LVA)
Alexandra Dulgheru (ROU) v Kristina Mladenovic (FRA)
Kirsten Flipkens (BEL) v Annika Beck (DEU)
Anett Kontaveit (EST) v Victoria Azarenka (23) (BLR)
Belinda Bencic (30) (SUI) v Tsvetana Pironkova (BGR)
Vitalia Diatchenko (RUS) v Anna-Lena Friedsam (DEU)
Alison Van Uytvanck (BEL) v Bethanie Mattek-Sands (USA)
Yi-Fan Xu (CHN) v Ana Ivanovic (7) (SRB)
Maria Sharapova (4) (RUS) v Johanna Konta (GBR)
Richel Hogenkamp (NLD) v Qiang Wang (CHN)
Nicole Gibbs (USA) v Lesia Tsurenko (UKR)
Daria Gavrilova (AUS) v Irina-Camelia Begu (29) (ROU)
Flavia Pennetta (24) (ITA) v Zarina Diyas (KAZ)
Lin Zhu (CHN) v Aliaksandra Sasnovich (BLR)
Mariana Duque-Marino (COL) v Naomi Broady (GBR)
Shelby Rogers (USA) v Andrea Petkovic (14) (DEU)
Karolina Pliskova (11) (CZE) v Irina Falconi (USA)
Coco Vandeweghe (USA) v Anna Karolina Schmiedlova (SVK)
Edina Gallovits-Hall (ROU) v Urszula Radwanska (POL)
Danka Kovinic (MNE) v Samantha Stosur (22) (AUS)
Barbora Strycova (27) (CZE) v Sloane Stephens (USA)
Polona Hercog (SVN) v Lauren Davis (USA)
Su-Wei Hsieh (TPE) v Kaia Kanepi (EST)
Alison Riske (USA) v Lucie Safarova (6) (CZE)
Caroline Wozniacki (5) (DNK) v Saisai Zheng (CHN)
Katerina Siniakova (CZE) v Denisa Allertova (CZE)
Lara Arruabarrena (ESP) v Pauline Parmentier (FRA)
Teliana Pereira (BRA) v Camila Giorgi (31) (ITA)
Garbine Muguruza (20) (ESP) v Varvara Lepchenko (USA)
Mirjana Lucic-Baroni (HRV) v Yaroslava Shvedova (KAZ)
Anastasia Pavlyuchenkova (RUS) v Mona Barthel (DEU)
Carina Witthoeft (DEU) v Angelique Kerber (10) (DEU)
Timea Bacsinszky (15) (SUI) v Julia Goerges (DEU)
Sesil Karatantcheva (KAZ) v Silvia Soler-Espinosa (ESP)
Johanna Larsson (SWE) v Christina McHale (USA)
Jarmila Gajdosova (AUS) v Sabine Lisicki (18) (DEU)
Svetlana Kuznetsova (26) (RUS) v Laura Siegemund (DEU)
Kristyna Pliskova (CZE) v Tereza Smitkova (CZE)
Monica Puig (PRI) v Monica Niculescu (ROU)
Jana Cepelova (SVK) v Simona Halep (3) (ROU)
Ekaterina Makarova (8) (RUS) v Sachia Vickery (USA)
Karin Knapp (ITA) v Magdalena Rybarikova (SVK)
Andreea Mitu (ROU) v Olga Govortsova (BLR)
Ana Konjuh (HRV) v Alize Cornet (25) (FRA)
Madison Keys (21) (USA) v Stefanie Voegele (SUI)
Yanina Wickmayer (BEL) v Elizaveta Kulichkova (RUS)
Tatjana Maria (DEU) v Bojana Jovanovski (SRB)
Ying-Ying Duan (CHN) v Eugenie Bouchard (12) (CAN)
Agnieszka Radwanska (13) (POL) v Lucie Hradecka (CZE)
Ajla Tomljanovic (HRV) v Klara Koukalova (CZE)
Tamira Paszek (AUT) v Casey Dellacqua (AUS)
Misaki Doi (JPN) v Elina Svitolina (17) (UKR)
Jelena Jankovic (28) (SRB) v Elena Vesnina (RUS)
Evgeniya Rodina (RUS) v Laura Robson (GBR)
Magda Linette (POL) v Kurumi Nara (JPN)
Kiki Bertens (NLD) v Petra Kvitova (2) (CZE)