He told The Times: “Everyone is agreed that he is one of the best managers in the history of football.
"My personal relationship with him is great but, if you ask me why, I don't know. I never ask for anything special from him and he can be a very hard guy to work with if you don't have good results because he always wants to win.
“He puts a lot of pressure on himself, the players and the staff. If you don't win, you're in big trouble."