Starting at 11.30am
[Q] Marta KOSTYUK (UKR) v [WC] Antonia LOTTNER (GER)
Not before 1pm
Karolina PLISKOVA (CZE)  v Kiki BERTENS (NED)
[WC] Maria SHARAPOVA (RUS) v Caroline GARCIA (FRA) 
Not before 6.30pm
Julia GOERGES (GER) v Marketa VONDROUSOVA (CZE)
Barbora STRYCOVA (CZE) v [WC] Laura SIEGEMUND (GER)
Starting at 2pm
Mihaela BUZARNESCU (ROU) / Alizé CORNET (FRA) v Veronika KUDERMETOVA (RUS) / Lidziya MAROZAVA (BLR)
Not before 4pm
Alicja ROSOLSKA (POL) / Abigail SPEARS (USA) v Carina WITTHOEFT (GER) / Anna ZAJA (GER)
Not before 8pm
Andreja KLEPAC (SLO) / Maria Jose MARTINEZ SANCHEZ (ESP)  v Nadiia KICHENOK (UKR) / Anastasia RODIONOVA (AUS)
Qualifier Kostyuk will be the youngest player to compete in the main draw here since 1995, at the age of 15.
Pliskova has made the quarterfinals in Stuttgart in both of the last two years.
Garcia is seeking her first career win over Sharapova.
Strycova is looking for her first victory since Doha in February.
Siegemund is the defending champion here.