He started pre-season training this week under Antonio Conte's orders.
"I found a team ready to target an historic third consecutive Scudetto, but who can also win the Champions League," he told journalists in Chatillon.
"What do I say after my first day of training? Well, I'll certainly have to run much more than in England...
"Feeling the passion of the fans is important for me. I came here to work hard and it took me just half a session to realise I'll have to work harder than in England."