United 'have £80m Koulibaly bid rejected'

Manchester United have reportedly had an £80m bid for Napoli centre-back Kalidou Koulibaly rejected.

Koulibaly only signed a new long-term contract with Napoli in September, and his current deal does not expire until the end of the 2022-23 campaign.

Last month, <a href="/football/barcelona/transfer-talk/news/barcelona-to-move-for-kalidou-koulibaly_338983.html">it was reported</a> that Barcelona were prepared to pay £88m to sign the Senegal international, who is believed to be a transfer target for a number of Europe's biggest clubs.

United boss Jose Mourinho has <a . . .