Agent Dario Canovi feels Victor Osimhen will be sold by Napoli this summer.
Osimhen's agents are due in London this week for talks with Manchester United, Chelsea and Liverpool.
Canovi told Radio Marte: "Osimhen makes you greedy, football is now business, Osimhen is also worth more than 150 million (euros), it would be very difficult to resist I think Italian football will lose another great champion to an offer like this.
"Now if I see (Sandro) Tonali, the image of Milan, leaving like this, for a lot of money in a strong team like Newcastle, but certainly not Liverpool, one of the two from Manchester, or Chelsea, we realise that England is from another football planet."