Club Deportivo Futbolistas Asociados Santanecos, commonly known as FAS (pronounced "fas"), is a professional Salvadoran football club based in Santa Ana. It competes in Primera División de Fútbol Profesional, the top professional league in the country. The team's nickname is Los Tigres (The Tigers). FAS was founded on 16 February 1947. The team plays its home games at the Estadio Óscar Quiteño, the third largest stadium in El Salvador. The club has a long-standing rivalry with Águila and Alianza F.C., and are the only three clubs to never have been relegated to the Second Division. Matches between them are known as Clásicos. FAS also plays a local derby against Isidro Metapán. FAS is the most successful club in El Salvador football. Domestically, the club has won a record seventeen national league titles. In international competitions, FAS have one FIFA recognized club trophies, tied with Alianza and Águila as the only club to achieve it. They have won one CONCACAF Champions' Cup/Champions League trophies, and finished runners up in the 1979 Copa Interamericana cup, and third place in the 1980 Copa Interclubes UNCAF.