straight to your inboxNapoli still haven't received an acceptable offer for Manchester City target Kalidou Koulibaly, their president has said.Koulibaly is an option for City, who are looking to further strengthen their central defensive options following the £41m arrival of Nathan Ake from relegated Bournemouth.However, City and Napoli are yet to agree a deal for the Senegalese defender, despite some reports in Italy saying Koulibaly was close to joining the Blues.In the past, Napoli president