Arsenal midfielder Matteo Guendouzi has paid tribute to former manager Unai Emery.

Now on-loan with Hertha Berlin, Guendouzi says he played his best football under Villarreal coach Emery at the Gunners.

He told France Football: "Unai Emery made me progress a lot, considered me very early on.

"I always gave everything for him. It worked really well with him. I played very great matches. I will thank him all my life.

"You cannot imagine how thorough he is. Normally you don't see a trainer sweating in training, running next to you because they want you to move on. It was a wonderful relationship with Emery."