German coach Tuchel led Chelsea to the Champions League title in 2021 and the Club World Cup crown in 2022, but has paid the price for an indifferent start to the new campaign.
New owners Todd Boehly and Behdad Eghbali have worked hard all summer to impose their authority at Chelsea, but this represents the boldest and most sweeping change yet.
Chelsea insisted they had made the change at the “right time” amid the club’s continued transition out of the Roman Abramovich era.
Chelsea also pledged to move quickly to appoint a replacement for Tuchel.
“Chelsea have today parted company with Head Coach Thomas Tuchel,” read a club statement published on Wednesday.
“On behalf of everyone at Chelsea, the club would like to place on record their gratitude to Thomas and his staff for all their efforts during their time with the club. Thomas will rightly have a place in Chelsea’s history after winning the Champions League, the Super Cup and Club World Cup in his time here.
“As the new ownership group reaches 100 days since taking over the club, and as it continues its hard work to take the club forward, the new owners believe it is the right time to make this transition.
“Chelsea’s coaching staff will take charge of the team for training and the preparation of our upcoming matches as the club moves swiftly to appoint a new head coach.
“There will be no further comment until a new head coach appointment is made.”