Germany coach Joachim Low said he believes Arsene Wenger has told Arsenal midfielder Mesut Ozil to improve his negative body language.
Speaking to German magazine Kicker as reported by ESPN, Low said he has told Ozil that he must show greater character to fulfil his potential - and he thinks Wenger has told him the same thing at the Emirates Stadium.
The former-Real Madrid star went through a difficult patch during his first season with the Gunners through the winter period, although Ozil has since said he's happy with his first campaign in the Premier League.
However, Low believes there's more to come from the talented playmaker, and he thinks he must work on his body language if he wants to become a top player on a consistent basis.
"During his first year at Arsenal he had to learn that football in the Premier League is even more intense and physical than in other leagues," Low said. "Ozil has been through a low at the end of last year, after that the injury followed.
"Mesut needs to work on his body language. He has heard it from me, and I believe, also from Arsene Wenger.
"He is an inspired footballer. But when he fails or is not able to solve a deciding situation, he also needs to show that he can swallow that and send out signals like, 'In spite of that, I am still here and I can still affect the game.'
"He is in the middle of a learning process, and he will come out on top. I bank on him and I have complete trust in Mesut Ozil."
Ozil wilted in the Champions League after missing a first-half penalty against Bayern Munich in the first-leg of their last-16 match, and Wenger later spoke about his physical and mental fatigue.
But the German international had a mid-season rest and will now take his place in Germany's bid to win the World Cup in Brazil this summer.