Reports from outlet Record in Portugal state United have sent scouts to watch the Benfica star against Casa Pia today.
Man Utd send scouts to watch former star they sold in the summer over buying him back in £17million transfer Sponsored by.
Carreras, who has a contract in Lisbon until 2029, has impressed this season in an attacking full-back role and he could suit Amorim's wing-back system.
MANCHESTER UNITED are considering a shock move to re-sign Alvaro Carreras, according to reports.
He had spells away from the club on loan at Preston, Granada and Benfica, with latter then making it a permanent move in the summer.
