Manchester United are scouting Espanyol left-back Aaron Martin.

Martin is 20 and United has asked Espanyol to keep them informed of any developments regarding his availability. 

Martin signed a new long-term contract in January that could keep him at Espanyol until 2022, but the club is anticipating needing to sell him.

Manchester City are also reported to be interested in Martin and it is likely Espanyol will demand his full €40 million buyout clause before letting him leave.