Jose Mourinho says he'll always be respectful towards Chelsea - but he now loves Manchester United.

The whole world of football will be watching to assess the level of sentiment cascading around Stamford Bridge as Mourinho goes back to the ground where the supporters have adored him so much in the past.

“I don't know how Chelsea fans will think now I am at another English club, at Manchester United," says the superstar manager.

“One thing they can be sure of --- I am Man United 100 per cent. I want to win with Man United.

“I will always be respectful to them. That feeling wont' change, but I love every club that I work for.

“I have this professional heart that makes me connect 101 per cent with my clubs. Even in Portugal, I was not born a Porto supporter, but I gave my life for the club.

“I gave my life for Real Madrid. I gave my life for Inter. I gave my life for Chelsea. I give my life for Manchester United. That is my professional nature. I am 100 per cent United."