Manchester United are determined to solve Rio Ferdinand's latest injury concern, even if that means an extended period on the sidelines. The England international has already been ruled out of Sunday's Premier League clash with Chelsea at Stamford Bridge after failing to recover from a calf injury that has been plaguing him for a couple of weeks.
However, boss Sir Alex Ferguson now fears the injury may be related to a lower back complaint.
"There has been no improvement.
"We are having to look at something different because usually you are back from a calf injury within two or three weeks.
"But there is no sign of recovery from this injury so we are looking at whether it is to do with his lower back."