Manchester United have revealed that Rafael da Silva has been ruled out of today's derby clash because of injury.

The Brazilian was expected to be a part of Louis van Gaal's four-man defence against Manchester City at the Etihad Stadium.

However, the team news confirmed Rafael's absence, with Antonio Valencia starting at right-back in his place.

A post on the club's official Twitter page read: "Rafael misses the derby after picking up an injury on Thursday."

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