The German, 49, has left Stamford Bridge just seven matches into the season, following a 1-0 defeat by Dinamo Zagreb in the Champions League on Tuesday night.
In a statement released by the club “On behalf of everyone at Chelsea FC, the Club would like to place on record its 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.
Tuchel was appointed by Chelsea in January 2021 and had an immediate impact, winning the Champions League in his first season at the club.
In 2021-22, Chelsea reached both the FA Cup and Carabao Cup final as they secured a third-place finish in the Premier League.
Tuchel spearheaded Chelsea at a time of uncertainty for the club as Roman Abramovich departed as owner last season.
Chelsea were one of the biggest spenders in the summer transfer window, signing Wesley Fofana, Aubameyang and Raheem Sterling.
Chelsea are sixth in the Premier League and play Fulham on Saturday.