The Brazilian is on loan in his home country, and appears happy enough to stay there permanently.
According to Universo Online, Flamengo officials came to England over the weekend to speak with United about securing Pereira permanently.
The two parties have a verbal agreement on 75 percent of Pereira's economic rights, per the source.
There is no suggestion as to what entity will buy the remaining 25 percent, but part-ownership is common in South American football.
United will gain roughly €14 million from the deal.
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