Napoli President has confirmed that Koulibaly will leave if clubs submit suitable bids.
The Senegalese has been tipped for big-money moves away, as Man City and United continue to be linked with the defender.
President Aurelio De Laurentiis has handed the Manchester clubs a huge transfer boost by saying that star Kalidou Koulibaly will be leaving for the right offer.
Senegal international Koulibaly has long been linked with a big-money move to the Premier League, with Liverpool, Chelsea and Manchester City all reported to have an interest.
President Laurentiis said: “Koulibaly? I’m ready to sell him if some club will submit the right bid.”
He tipped Arsenal Sokratis as Option to replace Koulibaly if he leaves: “We’re working to get Sokratis from Arsenal, we’re considering him as an option.”
Sky sports Jornalist, Fabrizio Romano reported that the Italian club has sold Allan to Everton and will be open to accept bids for Koulibaly.
Koulibaly who joined Napoli from Belgian side Genk in 2014 and has a contract with the Serie A side through 2023 could be coming close to the end of his Napoli career.
Manchester City who are heavily linked to the defender has already secured a £40 million ($52m) move for Bournemouth defender Nathan Ake, but they may have to bolster their defense even more by landing Koulibaly.
Gattuso side are asking around €90M for the defender, The Napoli chief told Sky Italia: “a great person, I would be terribly sad to lose him. But there is a time for everything, even to move apart. But the €90m is not on the table and so it takes two to make a deal.”