CENTER - 1:00 pm start
 Pauline PARMENTIER (FRA) vs.  Ekaterina ALEXANDROVA (RUS)
 Marketa VONDROUSOVA (CZE) vs. Irina-Camelia BEGU (ROU)
Anastasia POTAPOVA (RUS) vs. Sorana CIRSTEA (ROU)
 Fanny STOLLAR (HUN) / Heather WATSON (GBR) vs.  Irina-Camelia BEGU (ROU) / Galina VOSKOBOEVA (KAZ)
CENTER - Not Before 9:00 pm
 Alison VAN UYTVANCK (BEL) vs. Kateryna KOZLOVA (UKR)
Top seed Alison van Uytvanck is up to seven consecutive wins at Budapest following her second-round win over 17-year-old Polish qualifier Iga Swiatek. In last year's Budapest final, van Uytvanck defeated Dominika Cibulkova for her second and most recent WTA singles title.
Van Uytvanck and Kateryna Kozlova will be playing each other for the first time.
Ekaterina Alexandrova has a 2-1 head-to-head lead over Pauline Parmentier. Both of Alexandrova's wins came at the Limoges WTA 125K Series event, in 2016 and 2018 -- both times, Alexandrova went on to win the title.
It will be the first meeting for Marketa Vondrousova and Irina-Camelia Begu. Begu has won four WTA singles titles in her career, and Vondrousova has won one, but each went titleless last year after winning their most recent respective titles in 2017.
This is only the second tournament of the year for Vondrousova. The 19-year-old defeated Evgeniya Rodina in the first round of the Australian Open before falling to Petra Martic in her next match.
It is also the first meeting between Sorana Cirstea and Anastasia Potapova. 17-year-old Potapova made two WTA singles finals last year, at Tashkent and the Moscow River Cup. Former World No.21 Cirstea seeks her second WTA quarterfinal of the year, after reaching the final eight at Shenzhen to start 2019.
Hungary's Fanny Stollar is still in the mix to defend the Hungarian Ladies Open doubles title she won last year with Georgina Garcia Perez. Stollar is playing alongside Heather Watson this year, and they will face Begu and Galina Voskoboeva in Friday's semifinal.