Ten most expensive U21 players: Will Liverpool rebel join Chelsea & THREE Man United signings?

2. Luke Shaw (Southampton to Manchester United £33m)

Shaw became the world’s most expensive teenager last summer when the Red Devils agreed to part with a massive £33m to get their hands on the 18-year-old Southampton full-back.

Injuries meant that he started less than half of United’s league games in 2014-15, but there are still few that doubt that he will be a star for club and country in the years to come.