Jose Mourinho said it was an "easy decision" for him to return to Chelsea for a second spell in charge.
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It was announced on Monday that the 50-year-old had signed a four-year deal to manage the club he had previously helped to two Premier League titles.
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"It was an easy decision," ex-Real Madrid boss Mourinho told Chelsea TV.
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"He is undoubtedly a very good man manager, he gets people to play for him.
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"He is such good value. The media love him, even if they have had fallings out.
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"He understands how to talk to the fans, make the players motivated and play the media. He is a mover and a shaker, and the Premier League is better for having him back."
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"I asked the boss 'do you want me back?' and the boss asked 'do you want to come back?' - after a couple of minutes the decision was made."
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He added: "I'm very happy. I had to prepare myself to not be too emotional on my arrival at the club, but obviously I'm very happy."
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The Portuguese manager, who also helped the Blues to two League Cup wins and one FA Cup triumph, takes over from interim boss Rafael Benitez following a three-year period in charge at Real Madrid.
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He said that he would be looking to "improve the team" but not by spending millions in the transfer window.
Of course it would be easy. He would definately take advantage of Fergie's absence to rule England with Chelsea.