Murray stops Lopez to reach the fourth round

Andy Murray of Britain reacts after a point against Feliciano Lopez of Spain during their men's singles match at the U.S. Open tennis tournament in New York September 1, 2012.

NEW YORK (Reuters) - Olympic champion Andy Murray recovered from a mid-match wobble to defeat Feliciano Lopez 7-6 7-6 4-6 7-6 in the third round of the U.S. Open on Saturday.

Murray was leading 4-2 in the third set before Lopez fought back to send the match into a tense fourth set.

The Scotsman won the fourth-set tiebreaker 7-4 to claim the match in three hours and 53 minutes.

The third-seeded Murray will play American wildcard James Blake or 15th-seeded Canadian Milos Raonic in the fourth round as he attempts to win his first major championship.

(Writing by Will Swanton; Editing by Steve Ginsburg)