Attacking Midfielder: Kevin De Bruyne (Manchester City)
Signed for: £55m in 2015
Current Market Value: £135m
If Jose Mourinho had not benched Kevin De Bruyne at Chelsea for games on end, Manchester City may never have won the Premier League title with a record 100 points last season.
Such was De Bruyne's determination to prove him wrong that he first left Stamford Bridge for the Bundesliga where he won Player of the Year before returning to England to sign for City in a then-club record £55m.
Under Pep Guardiola, the Belgian found another gear and he absorbed everything his manager asked him to do to build a successful midfield partnership with David Silva despite both players being technical no.10s.
Under Guardiola, he has 14 goals and 34 assists in the league. If not for a certain Egyptian's record-breaking form at Anfield, De Bruyne was a shoo-in for Player of the Year last year.