structural:reformatting, linguistic:paraphrasing, information:classification, structural:expansion
Football

Real Madrid, founded in 1902, compete in La Liga and play their home games at the Santiago Bernabéu Stadium. The club is one of the most widely supported teams in the world and their supporters are referred to as Madridistas or Merengues (Meringues). Real's supporters in Madrid are often believed to be constituted principally of members of the middle classes, however, this claim is in dispute and has not been proved. It has also been suggested that a large proportion of Real Madrid's fans are members of the working class. The club was selected as the best club of the 20th century, being the fifth most valuable sports club in the world and the most successful Spanish football club with a total of 104 official titles (this includes a record 15 European Cups and a record 36 La Liga trophies).

Atlético Madrid, founded in 1903, also compete in La Liga and play their home games at the Metropolitano Stadium. The club is well-supported in the city, having the third national fan base in Spain and their supporters are referred to as Atléticos or Colchoneros (The Mattressers). Atlético is believed to draw its support mostly from working class citizens. The club is considered an elite European team, having won three UEFA Europa League titles and reached three European Cup finals. Domestically, Atletico have won eleven league titles and ten Copa del Reys.

Rayo Vallecano, founded in 1924, are the third most important football team of the city, based in the Vallecas neighborhood. They currently compete in La Liga, having secured promotion in 2021. The club's fans tend to be very left-wing and are known as Buccaneers.

Getafe CF, founded in 1983, also compete in La Liga and play their home games at the Estadio Coliseum. The club was promoted to La Liga for the first time in 2004, and participated in the top level of Spanish football for twelve years between 2004 and 2016, and again since 2017.

CD Leganés, founded in 1928, compete in Segunda Division and play their home games at the Estadio Municipal de Butarque. In the 2015–16 season, for the first time in their history, Leganés earned promotion to La Liga. They remained in the top flight for four seasons, reaching a peak of 13th in 2018–19, before relegation in the last game of the following season, a 2–2 home draw with Real Madrid.

Madrid hosted five European Cup/Champions League finals, four at the Santiago Bernabéu, and the 2019 final at the Metropolitano. The Bernabéu also hosted the Euro 1964 Final (which Spain won) and 1982 FIFA World Cup Final.