Premier League target Reinier has been likened to Ballon d'Or winner Kaka.
Out of contract next year, Everton, Arsenal, Manchester City, Real Madrid, and PSG are all tracking the Flamengo midfielder.
While his future remains unclear, he had a weekend to remember after scoring his first professional goal for Flamengo in their 3-0 victory over Avai.
And Fla coach Jorge Jesus said, "He will have a bright future. There are things similar to a Brazilian player who went abroad very early.
"He has style and the physical profile of Kaka."