The only goal of the match game in the 34th minute when Iran international Gholamreza Rezaei found the back of the net to give the hosts a well-earned lead.
In fact, the hosts dominated the side throughout and were perhaps unlucky not to have added to Rezaei's first half goal.
The first chance on goal came as early as the first minute, when Abdullah Al Muaiouf in the Al Ahli goal showed quick reactions to deny Vahid Amiry's miss-hit cross that was goal-bound.
Hossein Ebrahimi went close twice before the deadlock was broken 11 minutes before the half-time break, as Ebrahimi lifted the ball into the penalty area and found Amiry, whose first-time cross gave Rezaei a simple finish with his right.
In the second half, the hosts threatened to take complete control of the match and dominated possession throughout, but struggled to carve out more clear chances.
With 12 minutes remaining, they thought they had doubled their lead when Iman Mobali's free kick from 25 yards seemed goal-bound, but the ball crashed off the post with the goalkeeper beaten.