Mourinho said: "If you were to say there are 20 candidates for the title, nobody will laugh. That is Leicester's legacy.
"If you are just looking at what you call the big clubs, Arsenal and Tottenham are basically stable. Us and Manchester City have a new manager and some new players and, with the calendar, not much chance to train a lot.
"Chelsea also have a new manager but without European competition. To train Monday to Saturday -- without a midweek game and European competition, injuries and fatigue -- it's a special vitamin for someone who wants to fight for the title."