Esteghlal failed to regain top spot in the Iran Pro League after they went down 1-0 at Zob Ahan.
Mohamadreza Khalatbari scored the only goal of the game after 23 minutes for the hosts, who moved level with Esteghlal on 24 points, one behind leaders Sepahan.
Peykan also missed the chance to go top after they were held to a goalless draw at Shahin as they too moved onto 24 points.
Pas-Hamden moved off the bottom of the table after a 3-1 win over fellow strugglers Foolad.
Roozbeh Shahalidoost and an Ayub Vali own goal gave the hosts a half-time lead that Hadi Asghari added to in the 72nd minute before Hossain Moradi pulled a late goal back for Foolad, who now prop up the standings.
Finally, Est-Ahvaz defeated Malavan 2-0 thanks to strikes from Hadi Khanifar and Mehdi Daghagheleh.
