MIAMI - British sixth seed Andy Murray has downed former practice partner Feliciano Lopez 6-4 6-1 to reach the fourth round at the ATP and WTA Miami Masters.
Also advancing at the hardcourt event was Chinese world number two Li Na, the reigning Australian Open champion who dispatched American Madison Keys 7-6 6-3.
Defending champion Murray polished his record to 9-0 over Spaniard Lopez. The Scotsman, who does much of his off-season training in Miami, improved to 21-6 in his part-time hometown.
Murray, who struggled Friday in his first match without ex-coach Ivan Lendl in his player box, had a much easier time against Lopez, winning in 73 minutes.
"It's not always that easy to feel comfortable against him because there is not loads of rhythm with the way he plays," Murray said. "But I moved well, returned well. It was obviously a more comfortable scoreline than the other day.
"I don't know how hot it was, but when we came over at like 9:30 it was already 80 Fahrenheit (23 Celsius) and it was extremely humid.
"I've played a few matches here where it's been very, very hot. But it doesn't always stay like this for a few days in a row in March. They are not easy conditions."
Murray will line up next against French 11th seed Jo-Wilfried Tsonga, who outlasted Marcos Baghdatis 4-6 7-6 7-5.
Murray has won eight of their nine ATP meetings, the most recent last year on grass at Queen's.
Tsonga trailed a set and was down 5-1 in the second-set tiebreaker when he suddenly found some much-needed form, rallying to win after two and a half hours.
The Frenchman fired 16 aces and needed only one break of serve to make the winning difference.
Li spent nearly an hour surviving the first set, saving two set points on the serve of 38th-ranked Keys.