Argentina's two biggest clubs also make up the country's biggest sporting rivalry, and one of the fiercest in world football. Hardly surprising given that they both hail from Buenos Aires and were even formed in the same neighbourhood (La Boca) at the start of the twentieth century. Since then, River Plate may have moved to the north of the city but the rivalry has never gone away.
The third and fourth most popular, and successful, Argentine clubs make up the second biggest football rivalry in Argentina. Both clubs are from the port city of Avellaneda in Greater Buenos Aires, so the rivalry started because of the clubs close proximity to each other. And when we say close, we mean it. The club's two grounds are literally built next to each other, just 250m separating them!
The final club of Argentina's Cinco Grandes (Big Five) is San Lorenzo, and they have their own historic rivalry with another Buenos Aires club, Huracán.
The biggest rivalry outside of Buenos Aires is that of the two big clubs from the city of Rosario, Newell's Old Boys and Rosario Central.
Given the club's full names, Estudiantes de La Plata and Gimnasia y Esgrima La Plata, it's no surprise to learn that both are based in the city of La Plata. Anyone doubting how fierce the rivalry is for this one need only look back to 1992, when Gimnasia claimed beat Estudiantes 1:0. The celebrations from Gimnasia's fans when José Perdomo scored from a free-kick registered a low-intensity seismic event on a seismograph in the area, and so ever since the goal has been known as "El Gol del Terremoto" ("The Earthquake Goal").
The Clásico del Oeste translates as The Western Derby, because it features the two main clubs from the the western part of Buenos Aires, Vélez Sársfield and Ferro Carril Oeste. It's one of the oldest rivalries in the Argentinian league, although Ferro Carril Oeste's struggles to get out Primera B Nacional since the turn of the century has meant that the fans haven't been able to experience it as much in recent years.