Newcastle United have had a £6m offer turned down for a centre-back according to reports this morning.

Sky Sport Italia say that Napoli have knocked back an 8m euros (approx £6m) bid for defender Kalidou Koulibaly.

The Italian broadcaster says that the Serie A club’s president Aurelio De Laurentiis dismissed the offer out of hand.

Finishing fifth last season, Napoli are currently in third position in Serie A but only one point behind leaders Inter Milan and with serious title and Champions League qualification aspirations this season.

The 24 year old Koulibaly has been part of a defence that has conceded only 13 league goals and given the team a foundation for success.

The Senegal international was actually born in France and began his career at Metz, before moving on to Genk.

Only 18 months ago Kalidou Koulibaly moved on to Italy and Napoli for a reported 10m euros fee, so if Newcastle’s reported bid was genuine then it looks very much on the low side for a player who has now proven himself at a higher level than the Belgian league.

Sunderland are the only team to have let in more than Newcastle’s defence this season, while United centre-backs Steven Taylor and Mike Williamson are both out of contract in the summer.