The Blues, who had won the title last week, were held to a 0-0 draw by the Arak-based football team.
Earlier in the day, Tractor and Persepolis match in Tabriz was halted after Tractor fans threw objects at Persepolis players.
The Matchweek 28 Results:
*Paykan 1 – 2 Foolad
*Sepahan 3 – 0 Shahr Khodro
*Gol Gohar 2 – 0 Naft Masjed Soleyman
*Fajr Sepasi 0 – 1 Zob Ahan
*Sanat Naft 0 – 2 Mes