At this afternoon's short, sharp media conference, Mourinho discussed Leicester City's title defence this season.
He said: "I think it's difficult to retain the title, history says that and not many teams during Premier League history could do that.
“One of the teams was of course Man Utd, another one was some team managed from the worst manager in the history of football.
“But they are very good, they won the Premier League, because they were very good and they are still very good. I think they are an easy team to analyse, an easy team to understand.
“Their attacking organisation is very easy to understand too. But it's very difficult to cope with it. It's very difficult to keep a clean sheet against a team like Leicester."