Football, a wonderful game, can sometimes become a matter of life and death for some clubs and their fans. Cultural and regional differences contribute to the ferocity of these clashes, and the performances of the players in such matches decide whether they will be eternally loved or hated. A mistake or a moment of magic can create history, but it can also cause chaos, brawls, brawls, clashes and riots. These are the 10 fiercest and most important rivalries in the world of football.10.Corinthians vs PalmeirasDerby Paulista is the known name between the traditional football clubs of São Paulo, Sport Club Corinthians Paulista and Sociedade Esportiva Palmeiras. It is the rivalry between two football teams still present in the oldest city of Sao Paulo. The Paulista Derby is among the 10 greatest classic rivalries in the world. Corinthians and Palmeiras have already decided the state championships (Campeonato Paulista), the regional trophy (Torneio Rio-São Paulo), the national championship (Campeonato Brasileiro) and welcome the end of the continental club competitions (Libertadores Cup of America). No other classic rivalry has decided so many major championships. The biggest rivalry in the Brazilian state of Sao Paulo, SE Palmeiras and Corinthians have always been the subject of a lot of attention when they met. Books have been written and films documented about this rivalry, including a very famous version of Romeo and Juliet in which Palmeiras and Corinthians take the place of the Montagues and Capulets.9Nacional vs PenarolOne of football's classic derbies, from the 19th century, the Uruguayan one Clásico is the clash between the two biggest teams in Montevideo: Nacional and Peñarol. Both teams have... middle of paper... their anger because one of them threw a pig's head on Luís Figo during an El Clasico. Luis Enrique moved from Real Madrid to Barcelona in 1996 and became captain of the Blaugrana. Brazilian striker Ronaldo has played for both Barcelona and Real Madrid. Now the rivalry is between two players who are currently the best in the world period. Cristiano Ronaldo of Real Madrid and Lionel Messi of BarcelonaA 2007 survey conducted by the Centro de Investigaciones Sociológicas showed that Real Madrid had the largest fan following in Spain with 32.8%, while Barcelona had 25.7%. The next team, Valencia CF, is third with 5.3%. But overall Barcelona is the most popular team in Europe. Meanwhile, according to another survey carried out by SPORT+MARKT in 2009, Barcelona has around 44.2 million fans across Europe, which is around 2.9 million more than Real Madrid fans..