Just wanting to play isnt a good enough mentality for this club IMO. He should want to play at the highest level. Mourinho, IMO, was pushing him to become a better footballer. He's no old man. At 25 he shouldnt be past the age of learning, and adapting, his game. As our best player(a statement many people believe) he should have had more than half a season's worth of fight in him for our club. There is no question in my mind that Mata has more than enough quality to work in a mourinho system. It comes down to the simple question of "Did he want it?" though