Manchester United's title challenge is hanging by the slenderest of threads after they were held 0-0 by Blackburn at Ewood Park.

Sir Alex Ferguson's men are now a point behind Chelsea having played a game more, with only four matches to do something about it.

Although they dominated the game, the Red Devils were less than convincing and Antonio Valencia had their best two chances before the break, but was denied on both occasions by Paul Robinson.

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