Fifth-seeded Stefanie Voegele of Switzerland and Monica Niculescu of Romania also advanced to the quarterfinals. Voegele defeated 15-year-old Uzbek wild card Nigina Abduraimova 6-2, 5-7, 6-3 and Niculescu broke Evgeniya Rodina of Russia five times to win 6-1, 6-4.
Eighth-seeded Galina Voskoboeva of Kazakhstan lost to Darya Kustova of Belarus 1-6, 6-3, 7-6 (9). Kustova reached the quarterfinals of a WTA Tour event for the second time this season.
In the first round, second-seeded Shahar Peer of Israel, who won her fourth career title at the Guangzhou Open last weekend, advanced by beating Maret Ani of Estonia 6-1, 6-2.
Fourth-seeded Olga Govortsova also advanced to the second round, beating Arina Rodionova of Russia 6-3, 6-2.
Silva leaves exit door openSchiavone advances to 2nd round in Prague
