Jens Lehmann has broken his silence on being dumped by Arsenal as coach last summer.
Lehmann is now assistant coach at FC Augsburg.
He told The Sun: “I'm not frustrated. Nobody can really complain when such a great manager like Wenger after 22 years is not there anymore. Sooner or later things come to an end.
“I know Arsene could have gone on for another one, two or however many years because he is very young at heart and he is still very agile and a great manager as we know.
“Working alongside him changed my whole view and perception of management and I am really grateful to him.
“I was really grateful to learn the structure and the methodology, the team management and the amount of coaches – the fitness and medical guys, psychologists and so on.
“It's not easy today to manage such a big crowd inside your own coaching and medical staff. It was good for me to see and learn.
“But things like this happen. It gives me the chance for new challenges."