Prague WTA results on Tuesday (x denotes seeded player): 1st rd Simona Halep (ROU x1) bt Polona Hercog (SLO) 6-1, 1-6, 7-6 (7/3) Barbora Krejcikova (CZE) bt Patricia Tig (ROU) 6-4, 6-3 Magdalena Frech (POL) bt Elena-Gabriela Ruse (ROU) 7-6 (10/8), 6-3 Arantxa Rus (NED) bt Anastasia Pavlyuchenkova (RUS x6) 7-5, 6-2 Irina-Camelia Begu (ROU) bt Anastasija Sevastova (LAT x9) 6-2, 6-2 Camila Giorgi (ITA) bt Marta Kostyuk (UKR) 4-6, 6-2, 7-6 (7/4) Elise Mertens (BEL x3) bt Jasmine Paolini (ITA) 7-5, 4-6, 6-3 Lesya Tsurenko (UKR) bt Ekaterina Alexandrova (RUS x5) 6-2, 6-4 Kristyna Pliskova (CZE) bt Linda Fruhvirtova (CZE) 6-2, 7-5 Petra Martic (CRO x2) bt Varvara Gracheva (RUS) 7-6 (7/2), 6-3 afp