Arsenal defender Shkodran Mustafi says Unai Emery has an "aura" about him.

Mustafi is expected to start this afternoon at Chelsea.

He told arsenal.com: “When I first met him, he had this aura that he knew exactly what he wants to do, what he wants to be working on, what are is priorities and he was very detailed. He was not trying to show us new football but he was trying to put one idea into the team which is the same for everyone and we work for the same things.

“Most of the time, they were basic things. They were nothing special – he is not trying to change the football world. He is someone who has a clear idea and is looking at details, to one or two metres. In today's game that is very important because most of the time it is one or two metres that decides if it's a goal or no goal. My first impression was that he is someone who really knows what he wants and really sticks to his idea."