A number of top European clubs including Chelsea and Liverpool are ready to make an offer for Napoli defender Kalidou Koulibaly.
The Senegalese international was already on Chelsea's radar last summer with his agent claiming that a move to Stamford Bridge was a possibility.
He eventually stayed in Italy becoming one of the most important players in defence for manager Maurizio Sarri.
But on Saturday, Calciomercato.it revealed that the Blues will launch another attack to secure the services of the 25-year-old.
Chelsea will lose experienced defender John Terry next season and will be desperate to add another centre-back to their squad.
Napoli are yet to comment on the rumours with reports in Italy claiming that owner Aurelio De Laurentiis has no intention of selling one of the club's most important players.