Starting at 2pm
Dayana YASTREMSKA (UKR) v Kristina KUCOVA (SVK)
Daria GAVRILOVA (AUS)  v ZHANG Shuai (CHN)
Garbiñe MUGURUZA (ESP)  v Luksika KUMKHUM (THA)
Not before 7pm
Elina SVITOLINA (UKR)  v WANG Qiang (CHN) 
Starting at 3pm
Nadiia KICHENOK (UKR) / Anastasia RODIONOVA (AUS) v Shuko AOYAMA (JPN) / Lidziya MAROZAVA (BLR) 
Gavrilova was last year's runner-up, losing to Anastasia Pavlyuchenkova in the final 5-7, 6-3, 7-6(3).
Cornet is a former doubles champion here, winning with Yaroslava Shvedova in 2015.
Gavrilova and Zhang's only previous meetings have been on clay. The Australian won their most recent clash, in Charleston two years ago; the Chinese player won their first meeting, eight years ago in Saint-Gaudens.