Cassano was reflecting on Inter's 2-0 defeat of Juve on Sunday.
He said, "Inter have stuffed Juventus. I would not have imagined it, I thought they would have played better.
"Some time ago I said that Cristiano Ronaldo would have been a problem with the idea of Pirlo. I do not judge Ronaldo, who has scored 800 goals, but in a new cycle with the idea of Andrea, where you have to press forward, I saw Ronaldo who is starting to struggle.
"I don't see him in Pirlo's idea, in the last few games, between the lines. I believe in Andrea's idea, he will have a future, but now in a moment of transition for Juventus it's a hitch."