Roy Hodgson has stepped down as Crystal Palace boss so the club can “bring forward their plans to appoint a new manager”.
Hodgson was “taken ill” during training on Thursday amid reports he was to be sacked.
The Eagles have lost 10 of their past 16 Premier League games and are 16th in the table, five points above the relegation zone.
Palace visit Everton, who are 18th in the Premier League, on Monday night, with Hodgson’s assistants Paddy McCarthy and Ray Lewington in charge of the team.