The Istanbul Shield (Turkish: İstanbul Şildi) was a football tournament for Istanbul clubs in Turkey which was organised between 1930 and 1939. At the beginning it was decided that the club which would win the most titles during the nine-year span would be the final owner of the shield. The final match between Galatasaray and Fenerbahçe in 1931 was not played. In 1932, Fenerbahçe, Galatasaray and Beşiktaş did not participate and İstanbulspor won the shield. In 1933 the final game was cancelled when Fenerbahçe was leading 2–0. Galatasaray won the repeated game by 1–0 and received the shield. The tournament was later re-organized under the name Istanbul Football Cup (İstanbul Kupası in Turkish).