El Clásico (in Spanish, also in lowercase letters; Spanish pronunciation: [el ˈklasiko]) or El Clàssic (in Catalan, pronounced [əl ˈklasik]), both meaning "The Classic", is the name given to any football match between rival clubs Barcelona and Real Madrid. Originally referring to competitions held in the Spanish championship, the term now includes every match between the clubs, such as those in the UEFA Champions League, Supercopa de España and Copa del Rey. It is considered one of sport's fiercest rivalries, and its matches have a global audience of hundreds of millions.
https://en.wikipedia.org/wiki/El_Cl%C3%A1sico