The Selecao captain is set to sit out their semi-final against Germany after picking up a costly booking, though Chelsea star Willian is expected to be fit for the tie
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The yellow card was his second of the tournament, meaning he is set to miss Tuesday's semi-final tie against Germany, but his side feel that he did not intentionally get in the 25-year-old's way.
"I can confirm that we have received an appeal from the CBF and this is being analysed," Fifa media director Delia Fischer said.
Meanwhile, Willian is expected to be fit to face Germany, despite limping out of training on Saturday with an apparent back problem.
The Chelsea attacker has been tipped to replace Neymar in the last-four clash after the Barcelona star suffered a back injury of his own thanks to a heavy challenge from Camilo Zuniga.
However, the former Anzhi Makhachkala man's knock is believed to be a minor one and he is expected to be able to train with his team-mates as usual on Sunday.