Results on Friday in the WTA tournament in Monterrey, Mexico (x-denotes seeded player): Quarter-finals Leylah Fernandez (CAN) bt Viktoria Kuzmova (SVK) 7-5, 6-3 Sara Sorribes (ESP x7) bt Anna Karolina Schmiedlova (SVK) 6-3, 7-5 Ann Li (USA x8) bt Zheng Saisai (CHN x3) 7-5, 6-1 Viktorija Golubic (SUI) bt Anna Kalinskaya (RUS) 6-2, 6-4 afp