What is a derby? What is a clásico?Since football began in the British Isles, fierce rivalries have existed in the world's most popular sport. From the Balkans to the Río de la Plata, and from the Black Sea to the New World, the passion for the beautiful game has deep sociopolitical and cultural roots stretching from the early 20th century to the present day.This book explores 15 rivalries celebrated across different parts of the globe and explains why clásicos and derbies are far more than just football matches.