Murray battles past Monaco

The Scot had his serve broken twice in the first set and then faced a 0-40 deficit in the first game of the second set, but fought back to hold his serve and then took a firm grip on the match.

"The only thing that matters really is winning," he said.

"If I played great today and lost then I'm sure everybody would be pretty negative about it.

"I was really happy with the way I served. I thought that was just the key. I served a high percentage and got a lot of free points. When I really needed it in the second and third set then I found a big serve," he added.

"It's something in my game that's improved. I have to work on the rest of my game but I'm just happy I've got the chance to do that. I could have lost today," said the 21-year-old.

Murray will play Chile's Nicolas Massu, a three-set victor over American Mardy Fish, in the next round.

Rafael Nadal's match was preceded by a flamenco dancer on the stadium court, but there was little need for fancy footwork from the Spaniard as he enjoyed a routine 6-2 6-2 win over Russian Teimuraz Gabashvili.

The Spaniard will now face Portugal's Frederico Gil in the next round.

American Sam Querrey was knocked out by Spain's Feliciano Lopez 6-7 7-5 6-2, the number 32 seed firing 15 aces and breaking serve three times to set up third-round tie with compatriot Fernando Verdasco.

Eighth seed Verdasco defeated German qualifier Benjamin Becker 6-3 6-4. The Spaniard lost on his own serve three times but converted five of eight break point opportunities on Becker's serve.