The 18-year-old was a half-time substitute in the Copa Libertadores clash against Huachipato, with a scout from the 20-time English champions said to have been in attendance to monitor his display.
According to the Daily Mail, Man United are keen on Nunes, with the club currently looking at the South American market due to the inflated prices in Europe.
The report, though, claims that Manchester City, Liverpool and Arsenal are also keen on the teenager, with four of the biggest clubs in England therefore potentially battling for his signature.
Nunes has been with Gremio since the age of 15, progressing to first-team level this year, and he has now featured on 13 occasions for the senior side, scoring once and registering two assists.
Man United 'keen on deal for Gremio's Gustavo Nunes'The youngster, who primarily features as a left-sided attacker, has a contract with Gremio until December 2028, placing the Brazilian outfit in a strong position when it comes to any future negotiations.
Man United currently have two Brazilian players in their squad, but both could potentially be on the move during this summer's transfer window.
Antony is being heavily linked with an exit, having found it difficult to make his mark at Old Trafford since arriving from Ajax in the summer of 2022.
Casemiro also moved to Man United in 2022, and after a strong first season at the club, the 32-year-old has again been a regular this term despite some injury issues, making 25 appearances in all competitions.
However, the ex-Real Madrid midfielder could depart
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