Marcelo Bielsa was fired by Leeds United after suffering a fifth loss in six Premier League matches, the club announced Sunday.
Leeds' 4-0 defeat to Tottenham Hotspur on Saturday was enough to bring Bielsa's three-and-a-half-year spell to an end.
The loss dropped the Yorkshire outfit to 16th place, just two points above the relegation zone.
Former RB Leipzig manager Jesse Marsch is reportedly in line to replace Bielsa at the helm.
"This has been the toughest decision I have had to make during my tenure at Leeds United, taking into account all the success Marcelo has had at the club," Leeds chairman Andrea Radrizzani said.
"With Marcelo as our head coach, we had three incredible campaigns and the good times returned to Elland Road. He changed the culture of the club and brought a winning mentality to us all. The moments created, particularly in the 2019-20 season and winning promotion to the Premier League, will of course live long in all our memories, myself and the fans included."
Bielsa has enjoyed cult-hero status in Leeds ever since his appointment in June 2018. The eclectic Argentine, who had never spent more than two seasons at any single club, forged a strong bond with the side's supporters and brought a carefree style of play to Elland Road. Bielsa led Leeds back to the Premier League in 2020 and fired the club to ninth place in their first top-flight campaign in 16 years.
Injuries severely handicapped Leeds this season, with top scorer Patrick Bamford missing the majority of the campaign due to ankle and hamstring injuries and star midfielder Kalvin Phillips out long term with a thigh issue.
Despite losing key members, Leeds continued to throw caution to the wind, playing the same high-intensity attacking football that won them plaudits on their way up to the Premier League. But they ultimately paid the price on the other end of the pitch, closing out February with 20 goals conceded over five matches - more than any side in Premier League history has allowed in a single month.
If hired, Marsch would bring a similar pressing strategy to Leeds. He won the Austrian league and cup over two consecutive seasons with Red Bull Salzburg before taking the job at sister club RB Leipzig. Leipzig fired Marsch after taking just 18 points from 14 Bundesliga matches.