Frank Lampard has been sacked by Chelsea after just 18 months as head coach.
In a statement, Chelsea said “results and performances have not met the club’s expectations, leaving the club mid-table without any clear path to sustained improvement”.
Lampard, who is the club’s all-time leading goalscorer, enjoyed a good first season as Blues boss, taking them to the FA Cup final and securing qualification for the Champions League.
But after being given more than £200m to spend on new players in the summer, Chelsea find themselves ninth in the Premier League after 19 games, 11 points behind leaders Manchester United and five points off Liverpool in fourth.
Lampard took the side on a 17-game unbeaten run but away defeats to Everton, Wolves, Arsenal and Leicester and a 3-1 home defeat to Manchester City have cost him his job.
In a statement, Abramovich said: “This was a very difficult decision for the club, not least because I have an excellent personal relationship with Frank and I have the utmost respect for him.
“He is a man of great integrity and has the highest of work ethics. However, under current circumstances we believe it is best to change managers.
According to Sky in Germany, Thomas Tuchel is in line to replace Lampard. The former Borussia Dortmund coach is available after leaving Paris Saint-Germain in December.