Chelsea announced that Jose Mourinho's relationship with the club had "broken down" after he departed Stamford Bridge for the first time, on this day in 2007.
After he left by mutual consent, director of football Avram Grant and assistant manager Steve Clarke were put in charge of the first-team affairs.
After joining the club in June 2004 from Porto, where he had won the Champions League, Mourinho has guided the Blues to two Premier League crowns, the FA Cup, and two League Cups.
But, following a terrible start to the 2007-08 season, his relationship with the club had plainly deteriorated beyond repair, and the Blues administration believed it was affecting performance.
A club statement read: “Early this morning we announced that Chelsea and Jose Mourinho had agreed to part company by mutual consent.
“The key phrase here is that there was mutual agreement. Jose did not resign and he was not sacked.
“What is clear, though, is we had all reached a point where the relationship between the club and Jose had broken down.
“This was despite genuine attempts over several months by all parties to resolve certain differences.
“The reason the decision has been taken is that we believed the breakdown started to impact on the performance of the team and recent results supported this view.
“We did not want this to continue or affect the club further.”
In June 2013, Mourinho returned to Chelsea, and in 2015, he added another Premier League title and the League Cup to the trophy cabinet. However, he left west London in December of that year after losing nine of his 16 league appearances.
He moved to Manchester United before spending 18 months at Tottenham Hotspur, which concluded in April, ahead of a summer move to Roma, where he won the first three games of the 2021-22 Serie A season.