Meysam Teymouri scored an own goal in the 52nd minute in Rafsanjan’s Shohadaye Sanat Stadium.
Sepahan also defeated Sanat Naft 4-1 in Isfahan.
Reza Asadi opened the scoring for the hosts in the 13th minute and Aria Yousefi made it 2-0 in the 30th minute.
Isa Alekasir netted a brace in the 33rd and 50th minutes.
With 10 minutes remaining, Taleb Reykani scored a consolation goal for Sanat Naft.
Malavan will host Nassaji on Sunday, while Persepolis meet Gol Gohar in Tehran.
Tractor lead the table with 12 points out of six matches.
MNA/TT