Manchester United sent a scout to watch Benfica winger Goncalo Guedes last week.
And the 19-year-old, who is already valued at £45m, has also been watched FIVE times by Chelsea.
Guedes has been dubbed 'the next Cristiano Ronaldo' and is being chased by a host of big clubs.
Arsenal, Liverpool and Manchester City as well as Paris St-Germain and Bayern Munich have all shown interest.
play 19 year old Goncalo Guedes is already valued at £45m and has also been watched FIVE times by Chelsea