Former French Open Champion Francesca Schiavone moved into the quarter-finals with a hard fought 7-6(3), 6-3 win over Marina Erakovic of New Zealand.
The Italian world No.40 overcome a determined Erakovic in one hour and 49 minutes, saving four of the six break points she faced during the match.
Magdalena Rybarikova knocks out Kirsten Flipkens
Magdalena Rybarikova caused the biggest upset of the day by knocking out top seed Kirsten Flipkens in Birmingham on Thursday.
The Slovakian 2009 Aegon Classic Champion Rybarikova defeated the Belgian world No.20 7-6(5), 6-2 in one hour and 24 minutes to set up a quarter-final meeting with American Madison Keys.