Real Madrid sacked coach Vanderlei Luxemburgo following an emergency meeting of the club's board on Sunday.
The 53-year-old Brazilian, who was Real's fifth coach in the space of two and a half years, had been in charge of the team for just over 11 months.
Early reports say reserve team manager Juan Ramon Lopez Caro has taken over.
The club reportedly held initial talks immediately after Saturday's 1-0 win over Getafe, which was the club's first victory in three league games.
It is believed Luxemburgo did not take the team's training session on Sunday.
Cadena Ser radio and Antena 3 television speculated that the 53-year-old had already been told by club vice-president Emilio Butragueno and sporting director Arrigo Sacchi that he had lost his job.
Former Brazil coach Luxemburgo, who has been at the Bernabeu for less than a year, has been under huge pressure since the tame 3-0 home defeat to arch-rivals Barcelona.
Real followed that by salvaging a 2-2 draw at Real Sociedad with two late goals before the home victory over Getafe - a result overshadowed by David Beckham's third red card in two months.
They have qualified for the knockout stages of the Champions League but are unable to overhaul Lyon as Group F winners and will go into the second-round draw among the second-ranked teams.