Napoli defender Koulibaly is flying to London tonight.

Calciomercato.com says Koulibaly's move to Chelsea is now nearing completing.

There is now a full agreement for the Napoli centre-back and he is keen on the move to Stamford Bridge.

Koulibaly will fly to London later today ahead of completing a medical and finalising the move, for a fee in the region of €40m including add-ons.

Personal terms between the defender and Chelsea have already been settled.