Fulham defender Carlos Salcido has been ruled out for up to a month with an ankle injury.
Salcido picked up the problem following a tackle by Ashley Young in Saturday's 1-1 draw against Aston Villa and he had to be taken off in the 69th minute.
It has now been revealed that he suffered ligament damage and is facing a spell on the sidelines.
"It was a mistimed tackle on Carlos last weekend but I don't think there was any intention to hurt him," said manager Mark Hughes.
"Obviously Carlos is bearing the consequences of the challenge and unfortunately he has ruptured a ligament on his ankle.
"The likelihood is he will be out for three to four weeks."
Salcido will therefore miss a number of important games for the Cottagers, starting with Wednesday's clash against London rivals Chelsea.
The news of his injury will come as a major blow to Hughes because the Mexican has slotted in well at left-back since arriving from PSV Eindhoven over the summer.