Club Atlético de Madrid, S.A.D. (Spanish pronunciation: [ˈkluβ aˈtletiko ðe maˈðɾið]; meaning "Athletic Club of Madrid"), commonly referred to as Atlético Madrid or simply Atlético, is a Spanish professional football club based in Madrid that plays in La Liga. The club play their home games at the Riyadh Air Metropolitano, which has a capacity of 70,460. Founded on 26 April 1903 as Athletic Club Sucursal de Madrid, the club have traditionally worn red and white vertical striped shirts, being known as Los Colchoneros ("The Mattress Makers") and Los Rojiblancos (“The Redwhites”).
https://en.wikipedia.org/wiki/Atl%C3%A9tico_Madrid