The Süper Lig, is a Turkish professional league for association football clubs. It is the top-flight of the Turkish football league system and is run by the Turkish Football Federation. Eighteen clubs compete annually, where a champion is decided and three clubs are promoted and relegated from, and to, the 1. Lig. The season runs from August to May, with each club playing 34 matches. Matches are played Friday through Monday.
The competition was initially established as the Millî Lig (National League) in 1959 – the first professional nationwide league competition held in Turkey. The league succeeded the Turkish Football Championship and the National Division, both being former top-level national competitions. The Süper Lig is currently 11th in the UEFA coefficient ranking of leagues based on club performances in European competitions over the last five years. A total of 73 clubs have competed in the Süper Lig, but only six have won the title to date: Galatasaray (22), Fenerbahçe (19), Beşiktaş (15), Trabzonspor (6), Bursaspor (1) and İstanbul Başakşehir (1).