Rising Japanese star Naomi Osaka's eight-match winning run was brought to a halt by the ruthless Elina Svitolina.
Daniil Medvedev and Denis Shapovalov progressed after tough first-round matches at the Miami Open.
World number one Simona Halep is through to the third round of the Miami Open, along with a number of top WTA Tour rivals.
Simona Halep claimed a third-round place at the Miami Open on Thursday, but only after a hard-fought three-set battle with Oceane Dodin.
The WTA Tour has a new superstar in Naomi Osaka, the 20-year-old making it eight wins in a row by beating Serena Williams.
Indian Wells Masters champion Juan Martin del Potro is next up for Dutchman Robin Haase, who saw off Yuichi Sugita in Miami on Wednesday.
Serena Williams was in no mood to front the media following Wednesday's 6-3 6-2 defeat to Naomi Osaka.
Serena Williams was beaten easily by Naomi Osaka in Miami, the rising star describing the American as her favourite player on the tour.
After claiming successive titles in Acapulco and Indian Wells, Argentine star Juan Martin del Potro accepts winning is taking a toll.
After claiming the scalp of Petra Kvitova at Indian Wells, Amanda Anisimova has Garbine Muguruza in her sights in Miami.
World Cup winner Bastian Schweinsteiger and former world number one Ana Ivanovic welcomed their first child into the world on Monday.
World number one and defending champion Roger Federer cited Saturday's 11:00am schedule as a possible reason for his sluggish start.
Borna Coric could not quite hold on for a shock victory over Roger Federer, who showed class and resilience to reach the final.
Daria Kasatkina reached her maiden Indian Wells decider after rallying past seven-time major winner Venus Williams 4-6 6-4 7-5.
Simona Halep was the overwhelming favourite but the three-time grand slam finalist was outclassed by Naomi Osaka 6-3 6-0 on Friday.
Naomi Osaka blitzed Daria Kasatkina 6-3 6-2 in the battle of the 20-year-olds for the biggest victory of her young career.
Winning the Indian Wells Masters title came as a surprise to newly crowned champion Juan Martin del Potro.
Juan Martin del Potro emerged from the jaws of defeat for his maiden Masters 1000 title at the expense of defending champion Roger Federer.
World number one Roger Federer was left frustrated by his loss to Juan Martin del Potro in the Indian Wells Masters final.
Juan Martin del Potro is not daunted by Sunday's decider against world number one and defending champion Roger Federer.