The Brazilian was expected to sign for Flamengo permanently, where he has been playing on loan.
However, a dip in form and financial issues at the club mean that Flamengo will not be pursuing a permanent transfer.
According to TNT Sports, football director John Murtough at United has told Periera that he will get a chance to show what he can do in pre-season.
The midfielder will be offered opportunities by incoming boss Erik ten Hag.
Pereira has flattered to deceive for most of his career, failing to live up to his potential as a youth player.
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