Mourinho believes six clubs can win the Premier League this term.
"I've always been involved in a two-horse race," he said. "Inter and Roma, Porto and Benfica, Real and Barcelona, Chelsea and Manchester United. Two-horse races are completely different, not just because you are competing against a direct opponent, but because normally if a league is a two-horse race, it means the two horses never lose.
"When it comes to four, five, six teams, like it is now, every weekend someone loses points. When it comes to this profile of league, the best thing to do is not to look at the others, because there are too many, and just look at yourself.
"At this moment we have a group of six contenders more or less with the same potential. After that you can feel Everton, Newcastle, Southampton, Aston Villa, Swansea, all these teams. You can feel the gap is much shorter, even the teams at the other end of the table, they are all difficult. We've just played against the team that are bottom of the league and I don't understand how they are bottom, so it's tough."
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