The former Liverpool defender says the club need John Terry as his partners aren't in his league.
The comments come in a piece about the future of current Chelsea captain John Terry, whose contract is set to expire in the summer and is yet to be offered a new deal by the club.
Carragher though, believes that Jose Mourinho’s side will offer their current captain a new deal before too long, because they could not win the Premier League with a central defensive pairing of Cahill and Zouma.
"He is yet to sign a deal but I don’t for one moment expect the Stamford Bridge hierarchy to let him slip out of the club,” wrote Carragher.
“He is too valuable and given how Mourinho sets his team up, he could play for at least another two years. Gary Cahill and Kurt Zouma are good players but without Terry, I would not be confident about Chelsea winning the Premier League next season.”
Carragher has also backed John Terry’s decision to end talk about a potential England return.
Terry has been in fine form for his side throughout the season, guiding them to the top of the Premier League and a 2-0 win over Tottenham in the Capital One Cup final on Sunday afternoon.
His form has led to some quarters calling for him to be returned to the England set-up for the European Championships in 2016, but Terry was quick to end such talk and Carragher has backed his decision to do so.
“This season he is up to 36 and playing as well as he has ever done, leaving some to ask whether he could play for England again,” added Carragher.
“Wisely, he has ended such talk. He might be the best English defender but he is not needed for the Euro 2016 qualification campaign, as England have already qualified. The future for England is players such as John Stones and Callum Chambers.”