So much can happen in one season of football. Careers can be ignited but also fall by the wayside; expensive transfers can pan out perfectly or flop dramatically; and players can surge from nowhere to become major influencers in the sport—just take Marcus Rashford as your prime example from last term.
This week, Bleacher Report is taking stock of the players who have done their reputation a world of good this season, putting in stunning performances and adding millions to their own valuations.
We've scoured Europe's top five leagues for the 25 players whose values have increased the most, with many looking rather attractive potential acquisitions ahead of the 2017 summer transfer window.