Tractor Sazi edged past Padideh 1-0 in Mashhad’s Samen Stadium thanks to Hadi Mohammadi’s 9th minute goal.
Moreover, Sanat Naft was held to a 1-1 draw by struggling Siahjamegan and Naft Tehran drew 2-2 with Foolad.
IPL pacesetter Persepolis will face Machine Sazi on Saturday in Tabriz and Esteghlal will host Saba in Tehran’s Azadi Stadium.
With four games left until the end of the season, Persepolis remains top of the table with 59 points and one game in hand.
Esteghlal is third with 48 points with one game in hand as well.