Chelsea announced on Monday they had sacked manager Frank Lampard after a poor run in the Premier League.
“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,” said owner Roman Abramovich.
Chelsea are struggling in ninth place in the Premier League table, 11 points behind leaders Manchester United.
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They have lost five of their past eight Premier League matches after a good start to the season.
Former Paris Saint-Germain boss Thomas Tuchel in line to take over, reports said.