Prague WTA results on Thursday (x denotes seeded player): 2nd rd Simona Halep (ROM x1) bt Barbora Krejcíková (CZE) 3-6, 7-5, 6-2 Magdalena Frech (POL) bt Arantxa Rus (NED) 6-3, 2-6, 6-4 Sara Sorribes (ESP) bt Laura Siegemund (GER) 6-2, 6-3 Eugenie Bouchard (CAN) bt Tamara Zidansek (SLO) 7-6 (7/2), 6-7 (2/7), 6-2 afp