Both courts start at 2pm
Julia Goerges (GER)  v Aliaksandra Sasnovich (BLR)
Cagla Buyukakcay (TUR) v Ana Bogdan (ROU)
Elena-Gabriela Ruse (ROU) v Carla Suárez Navarro (ESP) 
Not Before 8:30 pm
Anastasija Sevastova (LAT)  v Danka Kovinic (MNE)
Jaqueline Cristian (ROU) / Cristina Dinu (ROU) v Alona Fomina (UKR) / Varatchaya Wongteanchai (THA)
Georgia Craciun (ROU) / Alexandra Dulgheru (ROU) v Elise Mertens (BEL) / Demi Schuurs (NED) 
Not Before 5.30 pm
Irina-Camelia Begu (ROU) / Raluca Olaru (ROU)  v Jessica Moore (AUS) / Prarthana Thombare (IND)
Catalina Pella (ARG) / Nadia Podoroska (ARG) v Irina Bara (ROU) / Tereza Mrdeza (CRO)
Carla Suarez Navarro seeks to reach a fourth quarterfinal of the year, having made that stage in Stuttgart and Strasbourg and the last four in Monterrey.
Victory today would see Julia Goerges reach the last eight in Bucharest for the first time, after being knocked out in the last 16 two years ago.
Top seed Anastasija Sevastova hopes to avenge defeat to Danka Kovinic in their only previous meeting. None of the three other singles match-ups on Wednesday have met before.
The leading seed has made the final in each of the three previous tournaments in Bucharest - Simona Halep winning in 2014 and 2016 while Sara Errani was beaten in 2015.