Prague WTA results on Friday (x denotes seeded player): 2nd rd Irina-Camelia Begu (ROM) bt Leonie Küng (SUI) 6-7 (3/7), 7-5, 7-6 (9/7) Quarter-finals Simona Halep (ROM x1) bt Magdalena Frech (POL) 6-2, 6-0 Elise Mertens (BEL x3) bt Eugenie Bouchard (CAN) 6-4, 1-6, 6-4 Kristyna Pliskova (CZE) bt Ana Bogdan (ROM) 2-5 - retired afp