MANCHESTER UNITED target Kalidou Koulibaly has split with his agent as he seeks a Napoli exit, according to reports. The Senegal centre-back, 27, is regarded as one of the best defenders in Europe. And The Independent reports he left his agent Bruno Satin last year and is now being looked after by his brother. Koulibaly signed a new deal last summer which commits him to Napoli until 2023. The Serie A outfit do not want to sell but a bid in the region of £100million would likely be enough to persuade them. United have also been linked with Real Madrid superstar Raphael Varane.French newspaper L’Equipe reported last month that World Cup winner was looking to leave Madrid after eight seasons in the Spanish capital. But Real boss Zinedine Zidane has cast doubts on the claims – insisting he wants to continue to work with his compatriot. Speaking at a news conference ahead of the visit to Valencia on Wednesday, Zidane dismissed reports about Varane’s supposed departure. He said: “I cannot imagine a future without Varane and I don’t want to.Latest Manchester United newsGossipRAI’S THE PRICE Man Utd want £155m from Real for Pogba… but agent Raiola would take chunk ExclusiveFelix…