The People says the attacker is being tipped to be a major star - both for his country and Benfica, who are being besieged by scouts watching the 20-year-old.
United chief Louis van Gaal had his top European scout in Portugal to see Talisca score a vital late winner for Benfica in their recent Champions League clash with Monaco. And the Reds plan to watch him again for Brazil against Austria on Tuesday.
It is not the first time Talisca - who can play off the main striker or as an attacking midfielder - has been among the goals for the Portuguese champions.
Benfica officials are believed to be pressing the youngster and his advisors to sign a new contract with a big buy-out clause rumoured to be around £35million.
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