Defending Miami champion Hurkacz advances, Medvedev stops Murray, Osaka gets walkover
Hubert Hurkacz unleashed 17 aces to topple France's Arthur Rinderknech 7-6(5) 6-2 and keep his title defence going at the Miami Open on Saturday as world number two Daniil Medvedev sent twice winner Andy Murray packing and Naomi Osaka advanced on a walkover.










