The Senegal international was heavily linked with a move away from Napoli ahead of the 2016-17 campaign, with Antonio Conte reportedly keen to lure him Stamford Bridge.
Nevertheless, Napoli refused to sell Koulibaly, who eventually signed a new deal with the Serie A club that runs until 2021.
“In the last few days of the transfer market, I refused an offer worth €58M for Koulibaly,” De Laurentiis told reporters. “Conte will say that it is not true, but he offered 30, then 40 and then €50M. But I had already made the decision for myself that he would stay put for another year.
“We can talk again next year…”
