Crystal Palace manager Roy Hodgson says forward Wilfried Zaha could be out for a long time with a hamstring injury.
The 28-year-old will miss Monday's Premier League trip to Leeds.
"We don't know how long it's going to keep him out but he certainly won't be available for this game and it could even be much longer than that," said Hodgson.
"You never know with these hamstring injuries, Wilf is incredible in terms of recovery so I wouldn't want to put a definite timeline on it, but it is a muscle strain and all muscle strains take time to heal.