Napoli defender Kalidou Koulibaly has changed agents ahead of a mooted transfer this summer.

The Independent claims the Senegal international has enlisted his brother to handle his affairs as he looks to depart the Serie A club this summer.

Manchester United are believed to be the frontrunners for Koulibaly, although Chelsea also retain a strong interest.

Real Madrid, Juventus and Paris Saint-Germain have also registered scouted the 27-year-old this season.

Although Napoli are reluctant to sell, the report claims a bid of £90-100m would be enough for them to part with their star centre-back.