"He lacks discipline. He wants to get on the ball and charge into tackles, there seems to be no discipline.
"Who does that come from? The manager. Wenger has to make sure he has a role in the side where he knows what to do when he does, and doesn't, have the ball.
"He can be petulant at times. Why is he petulant? Because the manager is petulant on the sidelines and it's never been sorted out."
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