Thomas Tuchel was fired by Chelsea on Wednesday only one month into the season.
The decision by Chelsea's new ownership came a day after the team lost to Dinamo Zagreb 1-0 in its first group match in the Champions League.
Chelsea has lost two of its first six games in the Premier League.
Chelsea was the highest-spending team in Europe during the transfer window with an outlay of nearly $300 million.
Tuchel was in charge for a year and a half, winning the Champions League in his first season.
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