The Blues have endured a stuttering start to the season after winning the Premier League and League Cup under Jose Mourinho last term.
The Portuguese coach was sacked in December following a disastrous start to the campaign and Chelsea closer to the relegation zone than the top of the table.
Guus Hiddink has since been drafted in to take over at Stamford Bridge until the end of the season and steer the west London side out of trouble.
Hiddink confessed on Friday that Chelsea cannot afford to ignore the possibility of relegation this season.
And former Liverpool defender Carragher feels that there will be no quick solution for the Blues this term.
Carragher wrote in his column for the Daily Mail: “Guus Hiddink has raised the prospect of Chelsea not being safe from relegation and his frank assessment has raised many eyebrows.
“I don’t for a moment think it will come to Chelsea being relegated but I am struggling to understand why there has been so much talk of a turnaround under Hiddink.”
He added: “Even with Jose Mourinho going there will not be a quick fix.
“Aside from recruiting a new manager in the summer, they will need three or four top-quality players to go into the team to freshen things up.”
Chelsea take on Paris Saint-Germain in the last 16 of the Champions League next month.
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