Olivier Giroud has been warned about his body language by Arsenal's coaching staff.

The Frenchman told L'Equipe that club coaches had been instructing him to tone down his emotions when he misses a goal-scoring opportunity.

"When I do this [putting his head in his hands] after a missed chance, the coaches get a bit annoyed.

"They want me to have a 'killer' attitude," Giroud said.

"Diego Costa shows no emotion. I am more emotional. I have therefore learned to control my emotions. I try to be less demonstrative."