You look at a good player in his position, such as Calvert-Lewin, and how they can be the focal point of attacks and help take pressure off the defence, and you see how much improvement he needs. He hits the deck too easily, doesn't drag defenders out of position so that teammates can run in the space he's vacated, and lacks any semblance of a first touch. I always give players at least a season to find their feet but he's been an abject failure in his first season. Great players find a way to win. He hasn't done that.