The former Palermo striker said: "I'm not afraid of Ronaldinho, nor AC Milan.
"Milan are strong, some say stronger than us, but I am convinced this is not the case.
"If I did not think Juve could win something, I wouldn't have come here. I've never won anything in my life and I wanted to join Juve precisely because I'm convinced that, playing in a team of this kind, finally I'll win something."