Napoli rejected a bid of £95 million (€106m/$120m) from Manchester United for centre-back Kalidou Koulibaly, according to club chairman Aurelio De Laurentiis.
Koulibaly has emerged as one of Europe's top defenders, having helped Napoli to back-to-back top-three finishes in Serie A.
The 27-year-old's exploits have captured the attention of several clubs around Europe, most notably Manchester United.
Editors' Picks
Speaking to the media at an event held by Corriere del Mezzogiorno, De Laurentiis confirmed that his club had turned down a massive bid for the Senegal international.
"[Jose] Mourinho wanted him, we rejected £95 million," De Laurentiis said.