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Branding and marketing a football league worldwide has never been more important - so some of these logos should probably look all too familiar.
Only a few decades ago, leagues didn't really bother with this sort of thing. It was just the league's initials in a basic font or a drawing of a football that looked like an old potato or whatever.
Not now. With every club competition battling for global recognition, they've all come up with a - hopefully - memorable design to market their league.
This is where you come in.
We've taken logos from 20 (mostly) elite leagues and set the challenge of identifying them all. Get guessing then when you're finished, tell us how you did - and challenge a friend to beat your score.
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