Arsenal hero Jens Lehmann says Arsene Wenger was made the club.
Lehmann has returned to Arsenal to do his coaching badges.
"Arsenal boss Arsene Wenger is a coach who does not only inspire you on the pitch but off as well, because when you talk to him you always find it very exciting and you're always getting some great information. I think that is what makes a great coach.
"He made Arsenal. He bought and sold so many players and has a fantastic financial track record. The new stadium and everything built comes down to him and to his performance.
"But although I quite enjoyed working for him, there were times it was psychologically very, very demanding.
"I argued with him quite often, particularly when he dropped me.
"But there was always a professional relationship and a private one, and the private one is still very good right now.
"I'm doing my coaching licence at Arsenal, which is a big gesture, and I really appreciate that."