Results from the WTA tournament in St Petersburg on Friday (x denotes seeding): Quarter-finals Margarita Gasparyan (RUS) bt Ekaterina Alexandrova (RUS x1) 6-2, 7-5 Vera Zvonareva (RUS) bt Anastasia Gasanova (RUS) 6-3, 6-1 Svetlana Kuznetsova (RUS x4) bt Jaqueline Cristian (ROM) 6-7 (5/7), 6-3, 6-3 Daria Kasatkina (RUS x8) bt Veronika Kudermetova (RUS x2) 1-6, 6-1, 6-2 afp