 Six months after the club's foundation, Serbian football and engineering pioneer, Danilo Stojanović–Čika Dača, on 14 September 1903, founded the football club Šumadija so Soko got their first domestic rival.Nevertheless, two years have passed until the match between two oldest clubs in the Kingdom of Serbia took place.On July 20, 1906, Šumadija and Soko met in Kragujevac, and Soko won by 6