Napoli will invite offers for Kalidou Koulibaly this summer for a knockdown fee.

A top, long-term target for the likes of Manchester United, Liverpool and PSG, Koulibaly will be allowed to leave Napoli this summer.

Il Mattino says Koulibaly will be available, with the Serie A side prepared to lower their asking price for the defender.

It's reported Napoli would ask for less than half of the previously touted €100m.

United will face competition from Liverpool and PSG for his signature.