#6. Jerome Boateng
Manchester City and failing defenders seem to go hand-in-hand as the club haven’t had a great record with the position since their huge investment began. At the moment they have Mangala and Otamendi who have both struggled with life in the Premier League and before that had the likes of Savic and Nastasic who weren’t good enough. Boateng didn’t look good enough either, but since leaving the club he has proved all of his doubters wrong and become one of the best defenders in the world at Bayern Munich. Man City will wish they would have kept him instead of letting him go.