Last year he got injured March 11th. Club said he wouldn’t be back training till April. Came on as sub against Chelsea April 1st. Personally I’m expecting him to be back training end February and ready at least bench NLD. I would guess it’s a mid grade strain 4-6 weeks based purely on the fact he walked off the pitch. If it was the most severe sprain 10–12wks as Herculrs has suggested you simply would not be able to walk 10 meters and he’d have been in much worse pain.