Rio Ferdinand praised Lisandro Martinez ahead of his move to Manchester United, but has doubts over the Argentine's pace and size.
United quickly turned their attention to Martinez last month after his Ajax teammate Jurrien Timber opted to stay with the Dutch champions. New United manager Erik ten Hag has prioritised targets he is familiar with and the club has backed the Dutchman.
Ferdinand is a fan of Martinez's game, but highlighted two areas of concern which could hurt him.
