El Derbi Madrileño, or simply El Derbi, is the name given to football matches between Real Madrid and Atlético Madrid, both hailing from the Spanish capital city of Madrid. Originally it referred only to those fixtures held in the Spanish championship, but nowadays the term has been generalized, and tends to include every single match between the two clubs, such as in tournaments like the UEFA Champions League, Copa del Rey and Supercopa de España.

Real Madrid Club de Fútbol, commonly referred to as Real Madrid, is a Spanish professional football club based in Madrid. The club competes in La Liga, the top tier of Spanish football.