Gregor Dimitrov beat top seed Carlos Alcaraz in straight sets to book a place in the Miami Open semi-final.
Novak Djokovic has revealed that he has split from coach Goran Ivanisevic.
Andy Murray picked up a serious ankle injury during his defeat to Tomas Machac at the Miami Open, which will put him out of action for an "extended spell".
Australian Open champion Jannik Sinner recovered from a set down to beat Tallon Griekspoor, while Daniil Medvedev and Casper Ruud also advanced at the Miami Open.
British veteran Andy Murray admitted that the end of his competitive career is nigh, but it's difficult to know when to call time.
Carlos Alcaraz survived a tense opening set to defeat Russia's Daniil Medvedev 7-6(5) 6-1 and defend his BNP Paribas Open title at Indian Wells on Sunday.