Ajax youth chief Wim Jonk has dismissed Manchester City as a threat to their youth success.
City have opened a new £200 million training complex, which they hope will boost the quality of players being produced by their academy.
But Jonk, who played in England with Sheffield Wednesday, scoffed: "Ultimately it's about what you do on the training pitch. Players should feel ok, here I really can get better.
"For everything they've done, City still cannot show a player who has is broken through. You know that the road is much longer there.
"A boy like Jairo Riedewald played here at 17, that's wonderful!"
