Looks like he's out for at least 6 months, with what is (probably) a re-occurance of the injury he had while at Chelsea. http://www.fulhamchronicle.co.uk/fulham-fc/2012/09/18/82029-31838256/ What bad luck for the young man.
Shame, was looking good in pre-season, and Jol Hinted he might get a first game or two. Doesn't sound too good if it's a recurring injury.