Trabzon is the most popular sport in Trabzon. The city's top sports club, Trabzonspor, was until 2010 the only Turkish football club in Anatolia to win the Süper Lig (six times), which was previously (until Trabzonspor's first championship title in the 1975–76 season) won only by the "Big Three" clubs of Istanbul, namely Galatasaray, Fenerbahçe and Beşiktaş. Due to Trabzonspor's success, the decades-old term "Big Three" which defined the most successful football clubs in Turkey had to be modified into the "Big Four". Trabzonspor is also one of the most successful Turkish clubs in the European Cups, managing to beat numerous
Galatasaray S.K. (football) Turkish football history. While football in Turkey began to fully develop, Galatasaray won ten more "Istanbul League" titles, six "Sunday League" titles and three "Friday League" titles until 1952. Upon the initiation of professional football in 1952, the first professional but non-national league of Turkey, "Istanbul Professional League", was played between 1952 and 1959. Galatasaray won three of these seven titles. "Türkiye Profesyonel 1. Ligi" (Turkish Super League today) formed in 1959. This is the top-flight professional league in Turkish nationwide football, and the most popular sporting competition in the country. Galatasaray joined all seasons and won 21 league titles