WTA Madrid Open results on Friday (x denotes seeded player): 1st rd Aryna Sabalenka (BLR x5) bt Vera Zvonareva (RUS) 6-1, 6-2 Darya Kasatkina (RUS) bt Irina-Camelia Begu (ROM) 4-6, 6-4, 7-6 (7/1) Jessica Pegula (USA) bt Sorana Cirstea (ROM) 7-6 (7/5), 6-3 Victoria Azarenka (BLR x12) bt Ekaterina Alexandrova (RUS) 7-5, 3-6, 6-1 Elise Mertens (BEL x13) bt Zhang Shuai (CHN) 6-3, 6-3 Elena Rybakina (KAZ) bt Ajla Tomljanovic (AUS) 6-4, 6-0 Zheng Saisai (CHN) bt Magda Linette (POL) 6-2, 3-6, 6-1 Simona Halep (ROM x3) bt Sara Sorribes Tormo (ESP) 6-0, 7-5 Karolina Pliskova (CZE x6) bt Coco Gauff (USA) 5-7, 6-3, 6-2 Anastasia Pavlyuchenkova (RUS) bt Madison Keys (USA) 7-5, 6-2 Jelena Ostapenko (LAT) bt Polona Hercog (SLO) 6-3, 6-1 Jennifer Brady (USA x11) bt Venus Williams (USA) 6-2, 6-4 Maria Sakkari (GRE x16) bt Amanda Anisimova (USA) 0-6, 6-1, 6-4 Anett Kontaveit (EST) bt Nina Stojanovic (SRB) 7-6 (7/4), 7-5 Karolina Muchova (CZE) bt Wang Qiang (CHN) 6-1, 6-3 Naomi Osaka (JPN x2) bt Misaki Doi (JPN) 7-5, 6-2 afp