Jose Mourinho has insisted that he was not sacked by Chelsea owner Roman Abramovich in 2007.
It has long been suggested that the Portuguese's relationship broke down with the owner in the latter stages of his tenure, but Mourinho has rejected such claims.
"That is not true. I read that I was fired and we had a complete breakdown in relationship, that was not true. At the time we thought it was the best for both of us," Mourinho told reporters at a press conference.
"It was a decision that was difficult for both of us but a decision made by mutual agreement. There was never a break of the relationship and that is why it was possible for me to be here today.
"I am back because we feel we are in a moment of my professional life and in the case of the owner, also a moment in his career as owner, where I think we are in the best moments of our careers and ready to work together again and in much better conditions this time and to succeed in what this club wants, which is stability."
Mourinho initially took charge of Chelsea in 2004.