Former Italy star Antonio Cassano says Cristiano Ronaldo is hurting Juventus.

Cassano was reacting to Juve's defeat at Porto in the first-leg of their Champions League round of 16 tie last night.

He remarked, "He scores one goal per game, but It is hard for him to understand (Andrea) Pirlo's idea of football.

"He has always been a bit selfish, he doesn't give a damn if others score, he is a player who lives to score. He does not live for the game, he lives for the goal and that makes, at this moment, the situation worse.

"Years go by for everyone and this puts them in difficulties."