Juventus striker David Trezeguet has hit out at the refereeing this season.
"They have been telling us that the referees are young, and that they need experience and we must help them. We are doing that, but now they have gone past what can be attributed to inexperience.
"I expected more from Collina. The players and the clubs can't wait for the refs to mature.
"The officials want to be protagonists and forget that people come to the stadium to see us, not them.
"Is it to do with Calciopoli? It could be, we should take that into account but you can't always be looking back. We don't have to apologise to anyone. This is the strongest Juve side of the last 25 years."