Results from ATP/WTA Miami Open on Tuesday (x denotes seed): Men 4th round Daniil Medvedev (RUS x1) bt Frances Tiafoe (USA) 6-4, 6-3 Roberto Bautista Agut (ESP x7) bt John Isner (USA x18) 6-3, 4-6, 7-6 (9/7) Jannik Sinner (ITA x21) bt Emil Ruusuvuori (FIN) 6-3, 6-2 Alexander Bublik (KAZ x32) bt Taylor Fritz (USA x22) 6-7 (5/7), 6-3, 6-4 Hubert Hurkacz (POL x26) bt Milos Raonic (CAN x12) 4-6, 6-3, 7-6 (7/4) Sebastian Korda (USA) bt Diego Schwartzman (ARG x5) 6-3, 4-6, 7-5 Women Quarter-finals Ashleigh Barty (AUS x1) bt Aryna Sabalenka (BLR x7) 6-4, 6-7 (5/7), 6-3 Elina Svitolina (UKR x5) bt Anastasija Sevastova (LAT) 6-3, 6-2 afp