Pato has been likened to Careca and the former Brazil international said: "Pato will become the best footballer in the world. He has a very bright future.
"Recently, Carlo Ancelotti has compared him to me, and I agree with this judgement and I am especially proud because Ancelotti was a very good football player and knows what he is talking about.
"Pato is very fast, can decide what to do in a fraction of a second and has good finishing ability. He also has a great desire to win."