The 18-year-old has hit out at the Blues for playing without any determination, whilst jumping to the defence of his fellow countrymen at the same time
The Blues were beaten 1-0 by the South American side through a Paolo Guerrero header in the 69th minute which was followed by a number of missed opportunities to equalise, Fernando Torres squandering the easier of the chances.
Chelsea were also reduced to ten men after Gary Cahill was sent off for a clash with Emerson which was then closely followed by a disallowed Torres goal who was offside, but Piazon believes it was the players who were at fault.
"We played without any determination, without a love for the shirt. Nobody wanted to play football. At least Oscar did try," Piazon told Terra.
"I won't name names, but the team played with no will. You can't play a final like this without the will to play. That's unacceptable.
"We lacked a lot of things, especially the will to be a champion. I think Ramires, David Luiz, just the Brazilians were the only ones that gave their everything, showed character and that is why they are sad."
David Luiz was seen wiping away tears as he walked off the pitch following his side's defeat, with Piazon claiming that he was one of the few that cared about the outcome of the match.
He continued: "I haven't spoken to anybody, but I've noticed David Luiz was upset. It's not a coincidence, he was one of the few that cared about the match, that gave his all".
UPDATE | 18:26 UTC
Lucas Piazon has denied criticising his Chelsea team-mates after posting the following message on Twitter: "All I said was that Corinthians had more courage to play the final than us, that they wanted more this title 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 thats why I was so sad."