"I'm not sure he knows what his role is," he told talkSPORT.
"I've spoken to a few German journalists who tell me the German players aren't particularly impressed with some of the work that is being done in training and what their roles in the team are.
"Mesut Ozil is not quite sure whether he is playing behind the main striker, whether he is meant to go out into the wide left area, what his defensive duties are. He looks tired and, at the moment, he is not worth his place in the team."
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