Chelsea have sacked manager Graham Potter after less than seven months in charge following Saturday's 2-0 home defeat by Aston Villa.
It was the Englishman's 11th defeat in 31 games since replacing Thomas Tuchel at Stamford Bridge on 8 September.
Chelsea, who have spent more than £550m on new players, are searching for their third manager of the season.
The Blues are in the bottom half of the Premier League after their latest loss - and 12 points off the top four.
Chelsea say Potter "has agreed to collaborate with the club to facilitate a smooth transition" and that Bruno Saltor will take charge of the team as interim head coach.