Results from the WTA tournament in Parma on Tuesday (x denotes seeding): 1st rd Anna-Lena Friedsam (GER) bt Viktorija Golubic (SUI) 6-4, 6-7 (1/7), 6-2 Coco Gauff (USA x3) bt Kaia Kanepi (EST) 7-6 (8/6), 7-6 (9/7) Sara Errani (ITA) bt Ana Bogdan (ROM) 7-5, 4-6, 6-1 Liudmila Samsonova (RUS) bt Giulia Gatto-Monticone (ITA) 6-2, 6-2 Petra Martic (CRO x2) bt Varvara Gracheva (RUS) 6-4, 6-2 2nd rd Katerina Siniakova (CZE) bt Serena Williams (USA x1) 7-6 (7/4), 6-2 Amanda Anisimova (USA x5) bt Anna Karolina Schmiedlova (SVK) 6-2, 6-4 Sloane Stephens (USA) bt Daria Kasatkina (RUS x4) 1-6, 6-4, 7-5 afp