"I have always said he is a very good player and will prove that on the pitch. That's not putting pressure on him, I just said what I think and I confirm that with his character he will prove it very soon," said the Milan boss.
"Pato is cool-headed and balanced, he won't have problems with nerves. I have never given a debut to one so young before, but we've had time to help him settle and he knows what to do."
Pato has been training with Milan for some months, but only received his international clearance last week.
"We think it was wise to bring him in earlier, as it gave him time to know his teammates and settle in. With his characteristics and pace he can play with any of our strikers, whether they be Alberto Gilardino, Pippo Inzaghi or Ronaldo."