He doesn't have to be committed, he just has to turn up and do the minimum. Otherwise you can't sack a player, and it's not like we are going to write off €75m. I'm not suggesting he is unprofessional as I'm certain he isn't, but you don't see a player excel if they aren't happy. And what would be even worse is if he does excel next season and still wants to leave and we lose a top class defender for half of what we could this season.
I like the idea of trying to push him along with us as he has so much potential, but I never saw him staying for long and it's always going to be a question of when not if he leaves. What concerns me most is negotiating in an increasingly weak position for our most valuable asset, he either goes now or he commits.