The 1903âÂÂ04 Scottish Cup was the 31st season of Scotland's most prestigious football knockout competition. The cup was won by Celtic when they beat holders Rangers 3âÂÂ2 in the final at the newly built Hampden Park to claim the trophy for a fourth time. The fixture may have been the point when the 'Old Firm' term began to be used in media to denote the relationship between the clubs, due to the increasing frequency of their meetings and the mutual commercial benefits of the growing rivalry.