10 minutes on the clock, 145 clubs to guess. How many can you name?
Remember to tweet your scores @FourFourTwo, and challenge some friends!
Once upon a time, it was only champions that were permitted into the European Cup.
The idea was to pit the winners of each European league against each other into one competition - and when you look at it that way, calling it the Champions League makes a lot of sense.
In the last 30 years, plenty has changed in football - but the champions of each country have remained fairly consistent across the board.
Can you tell us who they are?
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