Chelsea quoted price for Kalidou Koulibaly

Chelsea could get the chance to sign long-term target Kalidou Koulibaly during the upcoming transfer window.

The Senegal international has been one of Serie A's best-performing central defenders over the past eight years.

However, there is the possibility that he could leave this summer as he enters the final 12 months of his contract.

Napoli president Aurelio de Laurentiis has opened the door for his exit, and he could be available for a knockdown fee.

Koulibaly was valued at £80 million in the past, but the 30-year-old could be prised away for just £30m this summer.

His agent has already communicated with several clubs including Chelsea, who attempted to sign him in 2016.

The Blues have since been linked with him on numerous occasions, and could now make another approach.

The west London giants are expected to lose the services of Antonio Rudiger and Andreas Christensen this summer.

Sevilla's Jules Kounde has been targeted as a possible replacement, and Koulibaly could also be in the running.