The World Masters is a darts tournament, initially organised by the British Darts Organisation from 1974 and later by the World Darts Federation. It is one of the longest-running and most prestigious of the BDO/WDF tournaments. The tournament was originally sponsored by Phonogram before changing its sponsor in 1975 to darts board manufacturer, Winmau. The World Masters was originally contested as the best of 5 legs before later transitioning to the set format.