Exactly. It doesn't really matter how well he does for Athletico, he's been at Juve for 3 years and has done jack shit. I rate the player and i thought he was very good for Lyon, and he was rather decent at Chelsea too. But fact of the matter is, he wasn't up to level at Juve. Maybe new surroundings and a new league would get him back to his old self, but that doesn't mean he will perform in the same way for Juventus.