Former Inter Milan chief Gigi Simoni is convinced Mario Balotelli will be a star.
Balotelli is on the verge of leaving Inter for Manchester City, where he would reunite with Roberto Mancini.
"Balotelli is worth much more than 30m Euros," said Simoni.
"Still considering that he practically argued with all his teammates at Inter it is hard to think he will stay there. He has the potential to be the best in the world.
"Mario is a difficult guy to understand and he must prove that he is a champion both in his head and in the legs.
"If you think that not even Javier Zanetti, who is a great guide, couldn't manage to teach him then "
Simoni believes Balotelli will definitely leave San Siro this summer.
"It is up to Massimo Moratti, but I can't see a future in Milan for the boy."
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