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There are very few secrets left in football.

Gone are the days where European competition brings sides few have heard of and even fewer can spell the name of; a wealth of knowledge, analysis and footage has taken its place.

But there are still some areas scarcely covered—at least in the mainstream media, anyway. There's a general focus on Europe's "top 5 leagues"—defined by UEFA's coefficient as La Liga, the Premier League, the Bundesliga, Serie A and Ligue 1—but what about the others? What talents have they to offer?

We've compiled a list of the top 20 players playing in Europe, but outside of UEFA's top five leagues. Players who are on loan from clubs inside those top five leagues (such as Bertrand Traore at Ajax) are not eligible.