Results in the Istanbul WTA tournament on Wednesday (x denotes seeded player): 2nd rd Katerina Siniakova (CZE) bt Kristina Mladenovic (FRA) 6-4, 3-6, 6-4 Ana Konjuh (CRO) bt Wang Qiang (CHN x8) 6-1, 6-4 Marta Kostyuk (UKR) bt Daria Kasatkina (RUS x4) 6-3, 7-5 Sorana Cirstea (ROM) bt Anastasia Potapova (RUS) 7-6 (8/6), 6-4 1st rd Kaia Kanepi (EST) bt Zarina Diyas (KAZ) 6-4, 6-4 afp