There are a number of major football rivalries in Argentina.
The Superclásico (Superderby) is the most important football rivalry in Argentina, and the most important local derby. It is contested between Buenos Aires rivals Boca Juniors and River Plate. It derives from the Spanish usage of "clásico" to mean derby and the prefix super is used because Boca Juniors and River Plate are the two most popular and successful teams in Argentine football commanding more than 70% of all Argentine football fans between them.
The Superderby is known worldwide as one of world football's fiercest and most important derbies. It is particularly noted for the passion of the fans, the stands of both teams feature fireworks, coloured confetti, flags and rolls of paper. Both sets of supporters sing passionate songs (often based on popular Argentine rock band tunes) against their rivals, and the stadiums are known to bounce with the simultaneous jumping of the fans. Sometimes the games have been known to end in riots between the hardest supporters of both sides or against the police. The English newspaper The Observer put the Superclásico at the top of their list of 50 sporting things you must do before you die.
The Avellaneda derby (Clásico de Avellaneda), contested between Independiente and Racing, is the second most important rivalry in Argentine football. The two teams have many fans throughout the country. Independiente and Racing are the third and fourth most popular clubs in Argentina, accounting for more than 9% of the nation's football fans.) Both are among the most successful teams in terms of total number of league championships won. The match is the second most important local derby behind the Superderby.