CSKA (Bulgarian: ЦСКА) is a Bulgarian professional association football club based in Sofia and currently competing in the country's premier football competition, the First League. CSKA is an abbreviation for Central Sports Club of the Army (Bulgarian: Централен Спортен Клуб на Армията). CSKA's home colors are red and white and its home ground is the Bulgarian Army Stadium. The club's biggest rivals are Levski Sofia and matches between the two sides are known as "The Eternal Derby of Bulgaria".