Portuguese media outlet Record, as quoted by the Daily Express, is reporting that Manchester United have been keeping tabs on the 18-year-old after his breakthrough season at Sporting Lisbon.
The same article states that the 20-time English champions could use Brazil international Alex Telles in a swap deal for Mendes in the 2021 summer transfer window.
According to the same story, Manchester United are under no pressure to sign a new left-back following Luke Shaw’s excellent campaign and the presence of Telles as back up.
However, Record claim that Manchester United could make a swoop to sign the Sporting Lisbon teenager at the end of the 2020-21 Premier League campaign.