It would be difficult, but that is why we brought courtois back. If courtois comes out to grab the balls in the air like he's shown he's good at, we will eliminate dodgy goals from setpieces(like against Sunderland away, galatasaray away, PSG luiz own goal, stoke crouch, Liverpools Suarez) and goals conceded from easy crosses(like against westbroms altidore, Norwich away, Evertons Naismith, etc) I've left out a couple of games but those are the matches I remember we conceded stupid goals. I'm sure Mourinho noticed it too.