#4 Julian Weigl
Borussia Dortmund have always boasted the brightest crop of young talent in world football, however, they never manage to keep hold of those players, given their financial restraints.
Julian Weigl appears to be one of the lots so mentioned. The German midfielder has 24 appearances for his team this season so far. His precision and passing accuracy makes him a vital player in the heart of the midfield.
The 22-year-old is a brilliant reader of the game, his interceptions and concentration on the pitch could prove something of a high importance at Man United.
Reports are also claiming that Mourinho has had scouts sent to Germany to watch the player closely. The United boss has publicly expressed his desire to sign at least two midfielders this summer.
A fee close to £40 million is understood to be moving enough for the German side to budge into selling the player.