Real Madrid fans are called 'Madridistas', a nickname derived from their club's name.
For Barcelona fans, however, who call themselves 'cules', the terminology is not as straightforward - so what is the meaning behind the name? Goal takes a look.
Camp Nou has a capacity of almost 100,000, but the home of Barcelona wasn't always as expansive and accommodating.
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The true backstory of why Barcelona supporters call themselves 'cules' dates back to the early 20th century, when Barcelona played their matches at a small ground called Calle de la Industria which could hold only 6,000 people.