 The first goal in Napredak's history scored Marko Valok, who became later a famous player of Partizan Belgrade and Yugoslavian First League top scorer in 1950.In 1949, they became champions of Serbia, the first title of the club.In 1951, Napredak joined the Yugoslav First League for the first time, but they immediately relegated in the IV Zona (IV Zone), which was one of the 5 subdivisions of the Yugoslav Second League.