This decision was announced shortly after Forest's 3-0 home defeat to Chelsea on Saturday, October 18, 2025. He failed to win any of his 8 games in charge, with 2 draws and 6 losses. His tenure lasted only 39 days, making it the shortest managerial reign in Premier League history.
Postecoglou's reign began with a 3-0 defeat to Arsenal on September 13. His team exited the Carabao Cup after a 3-2 defeat to Swansea City.
The pressure on Postecoglou intensified with a 3-2 home defeat to FC Midtjylland in the UEFA Europa League, their second group stage loss.
During this period, Forest fans expressed their dissatisfaction, with some chanting for his dismissal during the Midtjylland game.
Postecoglou, known for his attacking philosophy, which involves a focus on possession, free-flowing movement, and a willingness to take risks, was unable to implement his preferred style successfully at Forest.
This tactical approach includes inverted full-backs, a high defensive line, and aggressive pressing.
While this style had brought success at previous clubs like Celtic and Tottenham Hotspur, it did not yield positive results at Nottingham Forest.
He leaves Forest one place above the Premier League relegation zone in 17th, the same position Tottenham were in four months prior when Postecoglou left the north London club after winning the Europa League.
🚨 BREAKING: Ange Postecoglou has been sacked as Forest boss.
— Ben Jacobs (@JacobsBen) October 18, 2025
Evangelos Marinakis informed him immediately after the Chelsea loss. Some brief goodbyes said before Postecoglou left the ground. pic.twitter.com/5topnO3K49
Postecoglou replaced Nuno Espirito Santo, who was also sacked by the club, making Postecoglou the second manager to be dismissed by Nottingham Forest this season.
Reports suggest that Sean Dyche and Marco Silva are strong candidates to replace Postecoglou, with Forest reportedly seeking a manager with a more pragmatic approach.