Chelsea have sacked manager Thomas Tuchel following their 1-0 Champions League defeat to Croatian side Dinamo Zagreb on Tuesday.
Tuesday's match was the German's 100th match in charge but was the latest in a string of disappointing results this season, with Chelsea having suffered two Premier League defeats in their first six matches too.
New owners Todd Boehly and Behdad Eghbali have worked hard all summer to impose their authority at Stamford Bridge, but sacking a manager who guided the club to the Champions League title 15 months ago represents the boldest and most sweeping change yet.
Chelsea said in a statement: "On behalf of everyone at Chelsea FC, the Club would like to place on record its gratitude to Thomas and his staff for all their efforts during their time with the Club.