Manchester United defender Rafael Da Silva has been ruled out of the fourth round FA Cup tie this weekend after suffering from concussion.

Rafael clashed heads with Blackpool's Marlon Harewood during last nights game, he had to be stretchered off and taken to the local hospital for x-rays. Fortunately the injury isn't as serious as first feared, he was quickly given the all-clear and returned to Manchester with his team mates.

Sir Alex Ferguson told ManUtd.com: "It's a straightforward one. He has concussion and will miss Saturday's game."