Jose Mourinho has begun his second spell at Chelsea after telling supporters he wants to start from "ground zero".
Mourinho, who signed a four-year deal on Monday following his departure from Real Madrid, travelled to Stamford Bridge early on Tuesday before moving on to the club's Cobham training base.
The Portuguese will welcome the Chelsea squad back for pre-season training in early July before leading tours to Asia and the United States.
And Mourinho is determined not fall back on past glories as he aims to build a side to rival his title-winning teams of 2005 and 2006.
He said: "I am not coming here to sleep on what I did in the past and be comfortable just because we have a great feeling and we have a great relation, I am not that kind of person and professional.
"I am very demanding of myself, I need of course the fans' support, but I want to start from ground zero.
"I need to work hard again and build a different team from the team I built in the past, and I want to give everything I can to the club, to the owner and to the fans, forgetting a little bit that I was champion here.
"I want to have that pressure on myself like it is the first time I am here and I have to work hard and to make sure they have a reason to be happy with me."
Mourinho is yet to remain at a single club for more than three full seasons but, at the age of 50, he hinted he may be ready to lay down roots in west London.
"I am the same," he said. "Physically the same, but every day you have to think about yourself and about evolution.
"I have the same nature, but I am much more mature with a different approach to things, I am more ready to be in a club and stay for a long time."
Mourinho also revealed it took just five minutes with Chelsea owner Roman Abramovich to agree his return.
He said: "It was an easy decision. I met the boss, I met the owner and in five minutes after a couple of very short but pragmatic questions, we decided straight away.
"I asked the boss 'do you want me back?' and the boss asked me 'do you want to come back?' and in a couple of minutes, the decision was made."
And there are no lingering hard feelings over the manner of his first departure, when he was replaced by Avram Grant barely a month into the 2007/08 season.
He said: "It was a difficult moment because I love it here and have a big connection with the club. Also for the club, my departure it was not easy.
"But if you analyse it in a cool way and you leave emotions a bit apart, I think it was fantastic. After that I had in my career what I was aiming for and Chelsea as a football club got important trophies, with important moments in the history of the club.
"Now we are back together and it is a great moment for both, so I think we are ready to marry again and to be happy and successful again."
Mourinho was the obvious choice to take Chelsea forward as the club's eighth new manager since he left in 2007, according to chief executive Ron Gourlay.
"I am delighted to welcome Jose back to Chelsea. His continued success, drive and ambition made him the outstanding candidate," Gourlay said on the club's official website.
"It is our aim to keep the club moving forward to achieve greater success in the future and Jose is our number one choice as we believe he is the right manager to do just that.
"He was and remains a hugely popular figure at the club and everyone here looks forward to working with him again."
Mourinho will address the English press at 1.30 pm next Monday, June 10, and former Blues forward Tony Cascarino is eager to see him back in front of the English media.
He added: "Jose Mourinho's first press conference is going to be like seeing the Rolling Stones or The Beatles! But let's put it in perspective, Mourinho is a very talented manager. There is no doubt about that. You only have to look at his previous clubs."