Tony Pulis has left Crystal Palace by mutual consent less than 48 hours before the club's opening Premier League fixture against Arsenal.
The 56-year-old had become disillusioned with Palace’s transfer strategy this summer and held showdown talks with the club’s co-chairman Steve Parish on Thursday evening.
Keith Millen will take charge of the first team for Palace’s season opener at the Emirates Stadium on Saturday.
Palace have completed deals for four players this summer but only Fraizer Campbell and Martin Kelly are cash purchases, with Chris Kettings and Brede Hangeland arriving as free transfers.
Pulis had clashed with Parish on numerous occasions this summer over the club’s transfer policy, having missed out on deals for Gylfi Sigurdsson and Steven Caulker.
Pulis, who was named as the Premier League’s manager of the year in May, took over from Ian Holloway last November with Palace in the bottom three but was able to guide the club to an 11th-placed finish.