Bayern Munich chief Sammer insists Chelsea, Arsenal target Mandzukic will stay
But, speaking to Sky Deutschland, Sammer warned: "No one needs to start knocking on our door about Mandzukic.
"He is incredibly important to Bayern.
"I always affectionately say that he plays like an animal. It is simply amazing how much work he does for the team and how much running he does during a game.
"They always try to provoke him because he really hurts his opponents with his work-rate."
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