Rio Ferdinand is not expected to play for Manchester United again in 2009 and has been told to take at least another six weeks rest.
The 31-year-old central defender had been playing with a back problem since last season and picked up a calf injury as a result in 2009/2010.
Manchester United medical staff have struggled to get to grips with the injury and there has even been talk that Ferdinand could need his hip realigned.
Ferdinand has played seven games in the Premier League and Champions League this season and the former West Ham and Leeds defender had hoped to be back in action by December.
The Premier League champions have been boosted by the news that Nemanja Vidic played an hour of Serbia’s friendly win over South Korea yesterday and is ready to start against Everton on Saturday.