Manchester United are reportedly considering a move for Sporting Lisbon teenager Nuno Mendes.
Alex Telles's ankle injury, which is expected to keep him on the sidelines until September, has left the Red Devils short of recover for Luke Shaw at left-back heading into the 2021-22 campaign.
According to A Bola, Telles's injury could force Man United to move for a new left-sided defender, and Mendes has been identified as a leading target for the 20-time English champions.
The 19-year-old, who was involved in the Portugal squad at Euro 2020, is believed to have attracted the attention of the likes of Manchester City and Real Madrid due to his performances last season.
Mendes enjoyed an impressive 2020-21 campaign for the Portuguese champions, contributing one goal and two assists in 35 appearances.
A recent report claimed that Sporting had already rejected a £21m offer from Man City for the defender, with the Lions looking for a fee in the region of £43m.
Man United have already spent big on Jadon Sancho this summer, while the club are closing in on the signing of French defender Raphael Varane from Real Madrid.