Sport Italia journalist Alfredo Pedulla claims the Toffees have approached Napoli with a £46m bid. The offer is said to have beaten Chelsea who are not willing to exceed their £37m valuation. Napoli will reportedly attempt to increase Koulibaly's £670,000-a-year wages but are said to be fearful he could leave.

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The report says if Everton's offer is successful, Napoli will turn their attention to Torino centre-back Nikola Maksimovic as a replacement. Koulibaly turned heads last month at Napoli when he demanded a new contract and threatened to enter into talks with Blues boss Antonio Conte. "Big clubs want to sign me and there is no sign of a renewal with Napoli," he said.

GETTY Everton have reportedly made a £46m bid for Kalidou Koulibaly

"I have not talked to him [Conte] but that may be soon - if nothing happens at Napoli, I will start to have contact with other clubs." The Senegal international's comments got him into hot water with Napoli president Aurelio De Laurentiis who claimed he had breached his contract and cost the clubs 'millions'.