Argentina international Angel Di Maria has been linked with a £15 million to Manchester United by a number of sources in the UK press.
Metro and Caughtoffside.com said the 25-year-old could replace Portuguese winger Nani at Old Trafford.
Sir Alex Ferguson will be looking to bring in new blood to eventually replace veteran midfielder Ryan Giggs too.
Despite a poor season by his standards, Di Maria is considered by many to be one of the outstanding wingers in world football.
Last year, only Real Madrid team mate Mezut Ozil provided more assists than him, and this term his had provided 10 assists and chipped in with nine goals in all competitions.
Di Maria signed for the club in a £30 million deal from Benfica in June 2010 and his has gone on to make 132 appearances for Los Merengues, scoring 24 times.