The Blues beat all-star Steel Azin 2-0 in front of 80,000 spectators at Tehran's Azadi Stadium on September 18.
Esteghlal striker Borhani scored the opener after 26 minutes and doubled the advantage nine minutes from time.
The victory moved Samad Marfavi's squad to the IPL top place with 15 points. Peykan and Moqavemat are placed second and third respectively with 13 and 12 points.
Next, the Tehran-based Esteghlal will meet Khorasan's Aboumoslem on September 24, followed by an as-ever-grudge-match against their arch-rivals Persepolis in the capital's derby on October 2.