Istanbul Friday League
The Istanbul Friday League was founded in 1912, and replaced the Istanbul Sunday League in 1915. Seven clubs took part in the league when it was first founded in 1912: Anadoluspor, Darülfünun, Terbiye-i Bedeniye, Türk İdman Ocağı, Mümaresatı Bedeniye, Şehremini, and Fenerbahçe S.K.
Champions
| Year | Winner |
| 1915–1916 | Galatasaray |
| 1916–1917 | Altınordu İdman Yurdu |
| 1917–1918 | Altınordu İdman Yurdu |
| 1918–1919 | Unaccomplished due to Mudros Armistice |
| 1919–1920 | Aborted |
| 1920–1921 | Fenerbahçe |
| 1921–1922 | Galatasaray |
| 1922–1923 | Fenerbahçe |