Arsenal, Manchester United and Barcelona have previously been linked with the Napoli defender and Bruno Satin has told Radio CRC that a transfer away from the Serie A club is possibile.
“Koulibaly, (Maurizio) Sarri and (Elseid) Hysaj at Chelsea?” he said.
“I know nothing, even if Chelsea get into the Champions League.
“The transfer market and the Napoli president make the value. This is because he hasn’t a release clause.
“I don’t know if these will be his last three games with Napoli, because each summer there are offers but he’s always remained.