#4 His teams are built around a strong defence
It is perhaps unfair to paint Mourinho is a solely defensive coach. For instance, his Real Madrid side wracked up an incredible 121 goals on route to the Spanish title in the 2011-12 season. But his sides have certainly always been built around a strong defensive set up.
That was particularly apparent during the early part of his coaching career. At Porto, his side conceded just 19 goals in 34 matches in his second and final season at the helm, while his Chelsea team who claimed the Premier League title in his debut campaign as head coach in the 2004-05 season remarkably only conceded 15 goals in 38 matches - 0.39 per match.
Over the course of the 13 full seasons he has completed at five different clubs, his teams have an average concession rate of just 0.76 goals per match. Only in his final season at Real Madrid has one of his sides ever conceded more than a goal per match.
And whenever his teams come up against other title contenders, he is more than happy to shut up shop and come away with a point or snatch a winner on the counter-attack.