John Terry turns 36-years-old in December but he remains Chelsea's most important defender this season.
An ankle ligament injury suffered against Swansea at the start of the month has seen the Blues captain miss their last two Premier League matches - both of which have ended in defeat.
For the second game running, Chelsea's defence were a shambles without Terry's presence as they lost 3-0 to Arsenal on Saturday and Antonio Conte was less than happy with what he saw.
Gary Cahill, David Luiz and Branislav Ivanovic were all under par at the Emirates Stadium as Alexis Sanchez and co. pounced on their vulnerability time and time again.
Chelsea have kept just one clean sheet so far this term and Conte is now planning a big shake up at the back, according to the Daily Mail.
Cahill and Ivanovic are both younger than Terry but are expected to be the biggest names to head the clear-out.
As much as they have missed Terry, Kurt Zouma's continued absence with injury has been equally harming to Chelsea's chances and Conte will be desperately hoping the Frenchman is available soon.
Luiz returned to Stamford Bridge on transfer deadline day, however, the Brazilian will not be guaranteed a starting role once everyone is fully fit.
And Conte wants to bring in two more centre-backs to make the competition for places even tougher.
After failing to land prime Serie A targets Leonardo Bonucci and Kalidou Koulibaly in the summer, the club have improved their domestic scouting network and could solve their defensive woes with talent currently based closer to home.
The Mail claim Middlesbrough's Ben Gibson and Burnley's Michael Keane have both been interesting the Blues of late but no official contact has been made yet.