Manchester United defender Nemanja Vidic has been ruled out of action for between four and five weeks with a dislocated shoulder.

The Serbian, who joined United from Spartak Moscow for £7 million in January 2006 and has played a key role in their charge towards the Barclays Premiership title, was injured during United's 4-1 victory over Blackburn at Old Trafford today.

The 25-year-old immediately signalled he was in trouble and was eventually carried down the tunnel on a stretcher.