Sousa has been one of the best performers for the Porto B team in recent months and has been tipped to progress to the first-team squad.
There is one problem with Sousa at Porto because his contract ends at the club next season and many clubs are interested in signing the 18-year-old.
As many as four Premier League clubs and La Liga giants Barcelona are interested in the midfielder. The clubs have also made proposals to the player in hopes of signing him up.
Porto are also not going to go down without a fight and they are preparing a new deal that will keep Sousa at the club for the foreseeable future.
The youngster would probably go to the reserve side so that we can find out how good he is before thinking about playing him in the first-team.
United do have a number of quality youngsters in the team and bringing Sousa in could add some competition for a place in the main squad.