Piazon was quoted questioning the players' desire.
He took to twitter to clarify his comments, saying: "All I said was that Corinthians had more courage to play the final than us, that they wanted this title more and that they played with more passion than us! I would never say something about my team-mates.
"I'm just 18 and with them I learn a lot of good things. And I also said that this title is so important for the South American clubs and that was a dream for me - that's why I was so sad."