Charlton new boy Yassin Moutaouakil faces a spell on the sidelines with an ankle injury.
The young Frenchman picked up the injury in last weekend's defeat to Stoke and scans have confirmed the full extent of the injury.
Addicks boss Alan Pardew believes the full-back will be out of action for at least a month.
Blow"I have to confirm that we have lost Yassin for four or five weeks at least, and that is perhaps a bigger blow to come out of the Stoke game than the defeat," Pardew told the club's official website.
"He was just settling into the side, and we were just starting to balance the team, with Yassin raiding down that right side. Now we are going to have a different shape to the team immediately."