Formed in 1857 as a way to keep cricketers fit in the winter, Sheffield became the world's first football club. For their first three years, they had no opponents, so were limited to playing intrasquad games. That changed in 1860 with the establishment of a second Sheffield club, Hallam FC.
Hallam hosted that first game at Sandygate Road, though the teams used Sheffield FC's set of rules, leading to the rivalry taking the name the Rules derby. Hallam also had a extra player, fielding fourteen men against Sheffield's thirteen. But the man advantage gave way to experience as the visitors ended up 0-2 winners.
Although the two teams currently compete in different levels of the English football pyramid, they keep the rivalry alive with friendlies, including a recent friendly in July 2013 that Sheffield won 4-2.