(CNN) -- Fourth seed Andy Murray survived a major scare to reach the third round of the Sony Ericsson Open in Miami on Saturday.
Murray celebrates recovering from the loss of the opening set to go through in Miami.
The British number one was hoping to build on his run to the Indian Wells final last weekend -- but had to recover from a poor start to defeat world number 59 Juan Monaco of Argentina 4-6 6-3 6-2.
Monaco, who turns 25 on Sunday, was inspired in the opening set but, having missed a chance to break in the opening game of the second set, faded badly as Murray gradually took control in the pair's first-ever meeting.
Later there were no such problems for world number one Rafael Nadal, who opened his bid for his first title at Key Biscayne with a 6-2 6-2 win over Teimuraz Gabashvili of Russia.
Nadal is also bidding for back to back wins in Masters 1000 tournaments having beaten Murray in the final at Indian Wells last week.
But there was a surprise when 14th seed David Nalbandian crashed to a heavy 6-1 6-3 defeat at the hands of Viktor Troicki of Serbia.
Eighth seed Fernando Verdasco progressed with a 6-3 6-4 win over Germany's Benjamin Becker, while fellow-Spaniard David Ferrer -- seeded 11 -- saw off American John Isner 6-3 3-6 6-2.
Meanwhile, world number one Serena Williams began her quest for a third consecutive title in the women's event with a straight sets victory over fellow-American Alexa Glatch.
Williams was never out of second gear to book a third round encounter against China's Peng Shuai with a 6-2 6-3 success.
Her older sister and Venus also eased through 6-3 6-3 against Israel's Shahar Peer. They could meet in the semifinals.
But third seed Jelena Jankovic lost her late night match to Gisela Dulko of Argentina 6-4 7-6.
Serbian Jankovic, last year's runner-up, had a 5-2 lead with a break in the second set and 5-2 lead in the tiebreaker.