Douglas Souza top scored with 22 points (18 attacks and 4 blocks) and Farhad Ghaemi led Iran with 14 points.
Iran has been scheduled to Meet Russia on Sunday.
The competition is being held from May 25 to July 8 in 22 host cities.
The 16 teams compete in a round-robin format with every core team hosting a pool at least once. The teams are divided into four pools of four teams at each week and compete five weeks long, with a total of 120 matches.
The top five teams after the preliminary round join the host of the final round to compete in the final round.
The relegation takes in consideration only the 4 challenger teams. The last ranked challenger team plays the promotion play-off against the Challenger Cup winners. The winners of the play-off will qualify for the next edition as a challenger team.