Former Manchester United manager Alex Ferguson believes it would be "foolish" if Chelsea owner Roman Abramovich sacks coach Jose Mourinho.
The defending champions are 14th on the English Premier League table and have won only four of their 15 matches so far.
Reports say Mourinho might be shown the door if Chelsea fail to win the next two matches.
"There is no point in sacking one of the best coaches of all time," Ferguson was quoted as saying by BBC on Tuesday.
"He has sacked so many coaches in the last 10 years. I am sure he has learned by it.He has to trust and have confidence that Jose can turn it round. In every country he has managed in he has won the big trophies."
"It would be foolish to sack him. It would be bad management."
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Mourinho came back to Chelsea for his second stint in 2013 won the league and Capital One Cup in his second season, adding to the two league titles, FA Cup and two League Cups he won during his first spell at the club from 2004 to 2007.
It is the first time that the Portuguese is going through such a dismal patch in his coaching career.
"Now is the first time he has been confronted with non-success during his whole career," said Ferguson.
"For the first time in his life he has had to deal with bad publicity and adversity and that is a challenge."
"But there are signs they are getting back to a balance, although they lost on Saturday.
"All good leaders will eventually find a solution. I know the guy and I know the work he has done in football and I can't see it lasting long," he concluded.