Croatian super agent Nikky Vuksan is tipping Dinamo Zagreb whizkid Alen Halilovic for the very top.
Manchester City are also keen, with a three-man delegation due in Zagreb this week to open talks about a January deal for Halilovic.
"Alen Halilovic is one of the biggest talents around the world," Vuksan told tribalfootball.com.
"Comparing him to any player is not fair to this very young kid.
"But he will most certainly be a very top senior player."