Though the striker's move from Sampdoria is yet to be rubberstamped, he is already training with the Milan squad.
Robinho said: "I am certain he will be happy and help us to win a great deal. I already played alongside Antonio in Madrid and, if his head is in the right place, he can do extraordinary things.
"I also remember the number of pranks he played on me. He's such a good laugh off the field, a generous and funny guy, even if he has a difficult personality."