Nottingham Forest fired manager Ange Postecoglou after a 3-0 home defeat by Chelsea, just 39 days after the Australian took over.
Postecoglou didn't win any of his eight matches in charge after replacing Nuno Espirito Santo on September 9 and owner Evangelos Marinakis made a ruthless call after Forest's fourth straight loss in all competitions.
Marinakis left his seat midway through Saturday's match at the City Ground and an announcement on Postecoglou's future was confirmed just 19 minutes after full-time.
"Nottingham Forest Football Club can confirm that after a series of disappointing results and performances, Ange Postecoglou has been relieved of his duties as head coach with immediate effect," the club said.
"The club will make no further comment at this time."
It was Postecoglou's first job since being fired by Tottenham at the end of last season, despite leading Spurs to the Europa League title to break their 17-year trophy drought.
Forest lost six and drew two of their eight games under Postecoglou, 60. That included four losses from five in the league, scoring one goal in the process.
Although there were promising moments in some games, he racked up some unwanted statistics.
He is the first Forest manager not to win any of his first eight matches, during which his side conceded 18 goals. His dismissal makes him the the shortest serving permanent manager since the English Premier League was formed in 1992.
Chances came and went for Forest in the first half against Chelsea, but once defender Josh Acheampong opened the scoring after 49 minutes, they folded.
Nuno was fired despite leading Forest into Europe following a very public falling-out with Marinakis, reportedly stemming from a breakdown in relations with the club's recently hired global head of football, Edu Gaspar.
Postecoglou seemed an odd choice as the replacement, given his preferred style of play — on the front foot and attacking — differed from Nuno's and the squad in place at the City Ground.
If the idea was for Postecoglou to bring a more expansive approach to Forest, it didn't materialise. In five league games under the Australian, the team scored one goal.
There was no immediate word of a replacement but Sean Dyche, the former Burnley and Everton manager, has been linked heavily with Forest in recent days.
Dyche, who was sacked by Everton in January, was a youth team player at Forest.
His direct and pragmatic playing style is more similar to Nuno's than Postecoglou's.
Shortest-serving English Premier League permanent managers:
Ange Postecoglou (Nottingham Forest)
39 days and eight games
Les Reed (Charlton)
40 days and seven games
Rene Meulensteen (Fulham)
75 days and 13 games
Frank De Boer (Crystal Palace)
77 days and four games
Bob Bradley (Swansea)
84 days and 11 games
Quique Sanchez Flores (Watford)
85 days and 10 games
Nathan Jones (Southampton)
94 days and eight games
With agencies
