Elsewhere, Katie Boulter progressed to the third round at Miami Gardens when Denmark’s Clara Tauson retired during their match through injury.
The British number three let a 5-3 lead slip as Tauson won the first-set tie-break 7-4, before she battled back to take the second set 6-4.
Boulter won the first game of the third set only for Tauson to decide she could not continue.
“It was a complete battle – some ugly tennis and ugly conditions as well, but you have to find a way,” Boulter said.
“Unfortunately she couldn’t finish but it is what it is. It’s never the way you want to win, but happy to be through to the next round.”
Meanwhile, Florida-born Coco Gauff beat Italy’s Elisabetta Cocciaretto 3-6 6-4 6-3 – a week after she pulled out of Indian Wells with a nerve-related injury to her left arm.
“This week made me realise how much I love this sport – even when it’s tough, I enjoy the ups and downs of the journey,” said the world number four, who served 11 double faults but came from a set down to claim victory on her third match point.
World number one Aryna Sabalenka was tested against unseeded Ann Li, taking one hour 42 minutes to grind out a 7-6 (7-5) 6-4 victory.
The defending champion created 15 break points but only managed to take three of them against her American opponent.
