With David Luiz’s exit looking more and more likely, Chelsea are increasingly looking like they will buy a defender soon.

Luiz’s contract runs out in July and Chelsea only offer rolling one-year contracts to players over the age of 30.

The Brazilian wants a longer deal, but if he doesn’t get one, will leave on a free in the summer, as reports the Telegraph. 

This means that Maurizio Sarri will be searching for a new starting centre-back as Luiz and Antonio Rudiger are his favourite pairing.

Chelsea FC v Manchester City - Premier League

 (Photo by James Baylis – AMA/Getty Images)

And Napoli’s exit from the Champions League may have opened the door for him to sign one of his former players.

Sarri transformed Kalidou Koulibaly from a centre-back with potential into one of the best in the world.

And his abilities were on full display in Napoli’s 1-0 loss at Liverpool on Tuesday.

Following the Italian’s side exit from Europe’s top competition, it may be time for the Senegal international to leave Italy.

Liverpool v SSC Napoli - UEFA Champions League Group C

(Photo by Alex Livesey – Danehouse/Getty Images)

And playing under the manager who transformed his career should be something that appeals to him.

Chelsea will have to beat competition from Manchester United for the £90m rated defender reports the Metro.

However, if the Blues have the funds, they must pay whatever’s necessary to bring Koulibaly to West London.