Aston Villa have seen their worst nightmare come to life as medical updates have revealed the extent of Boubacar Kamara’s injury after the Frenchman was hauled off during Sunday’s defeat to Manchester United. Suffering defeat to Manchester United and subsequently dropping out of the top four was bad enough for Unai Emery’s Aston Villa side to experience, with matters now becoming a lot worse as Boubacar Kamara is set to miss the rest of the season. The Frenchman was forced to withdraw from Sunday’s fixture in the 65th minute after going down unchallenged clutching his knee, leaving Villa fans …