#4 Luke Shaw
England and Manchester United left-back, Luke Shaw joined the club from Southampton in 2014 for a large fee making him the most expensive teenage footballer at the time. 3 years on, and Shaw has had a treacherous time at the club so far with injuries hampering his career.
With his contract coming to end at the end of the season, Shaw's contract can be extended by a year, provided Shaw does enough this campaign to impress the manager. Shaw will be an outside hopeful to make the England squad for the WC, as he has failed to make substantial appearances at club level.
Shaw has played in just a single Premier League game, a single UEFA Champions League game and a couple of EFL Cup games so far this season.
However, still only 22-years-old, Shaw could be one for the future provided United stick with the Englishman through these hard years.