Pereira is alleged to have broken quarantine rules when arriving in Brazil from England.
According to the nation's regulations, travellers from the UK must quarantine for 14 days due to COVID-19 restrictions.
Pereira only spent half of that time in quarantine, which could lead to a punishment from the Superior Sports Court for Football in Brazil.
In a statement released on Friday, they said: "Flamengo and Andreas Pereira will be judged next Friday, October 8, by the Fifth Disciplinary Committee of the Superior Court of Sports Justice for Football.
"The club was denounced for having climbed halfway before the mandatory 14-day quarantine period established by ANVISA Ordinance 655/2021 for travelers passing through the United Kingdom.
"The player will be liable for conduct contrary to discipline or sports ethics.
"The virtual session is scheduled to start at 10:30 am and will be broadcast live on the STJD do Futebol website."
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