Chelsea rocked as scan shows Drogba needs knee operation

Didier Drogba requires surgery on a knee problem which could keep him out for several weeks although the club have yet to decide when the operation will go ahead. The Ivory Coast striker had a scan yesterday, which showed that the injury to his left knee, first picked up while on international duty last month, has not healed. Chelsea's medical team will now examine the scan and talk to the player before making a decision on what action to take.