Chelsea have fired manager Jose Mourinho, just seven months after he won the Premier League title.
The club released a statement on Thursday confirming the decision.
"Chelsea Football Club and Jose Mourinho have today parted company by mutual consent," it read.
"All at Chelsea thank Jose for his immense contribution since he returned as manager in the summer of 2013.
"His three league titles, FA Cup, Community Shield and three League Cup wins over two spells make him the most successful manager in our 110-year history.
"But both Jose and the board agreed results have not been good enough this season and believe it is in the best interests of both parties to go our separate ways.
"The club wishes to make clear Jose leaves us on good terms and will always remain a much-loved, respected and significant figure at Chelsea. His legacy at Stamford Bridge and in England has long been guaranteed and he will always be warmly welcomed back to Stamford Bridge.
"The club's focus is now on ensuring our talented squad reaches its potential. There will be no further comment until a new appointment is made."
Pressure had been mounting on Mourinho following a dismal run of results in the Premier League, which included defeats to Manchester City, Crystal Palace, Everton, Southampton, West Ham, Liverpool, Stoke and Bournemouth.
A better showing in the Champions League, which saw the Blues qualify for the last 16, eased the pressure somewhat, but their latest defeat at Leicester appears to have been the last straw.
The Portuguese manager accused his players of "betrayal" in the wake of that loss.
Sky News reported that Mourinho was called to the training ground at Cobham to a meeting with chairman Bruce Buck and director Eugene Tenenbaum on Thursday afternoon.
The meeting lasted only 10 minutes, and the statement confirming his dismissal was released shortly after.
Chelsea finished eight points clear in the Premier League last season, and also won the League Cup, but they currently find themselves in 16th place on the table, just one point above the relegation places.