Fulham are waiting to hear the extent of Jack Grimmer's injury after the defender was stretchered off during the 1-0 League Cup win at Wycombe.
The 21-year-old full-back was replaced after 62 minutes and manager Kit Symons admitted after the game he was concerned.
The Whites boss said: "We're still waiting to find out but it looked a nasty one. I don't want to say too much yet but we've got our fingers crossed for him."