Has everything to his game as a centre-back. Imperious in the air, can mark players out of the game, able to tackle well, good on the ball, even carries a threat at the other end of the pitch.
Can get dragged out of position too easily from time to time though. And he can be a bit dirty, though I think the latter might be a direct result of the former. But it's early days and his reading of the game will only improve.