Poriya Hossein Khanzadeh scored 22 points for Iran, and Torey Defalco earned 32 points for the US.
It was Iran’s first win in nine matches in the 2024 VNL.
Eight of the world’s strongest men’s volleyball national teams - Brazil, Canada, France, Germany, Iran, Japan, the Netherlands and the US– have arrived in Manila, the Philippines.
Iran opened its week three campaign against the US, before facing tough games against Netherlands on Thursday, against France on Friday and against Germany on Saturday.
The VNL Preliminary Phase features three competition weeks per gender, with each of the 16 teams playing 12 matches. The seven best-ranked national teams in the Preliminary Phase will join hosts Poland for the Finals, which will be held in Lodz from June 27 to 30.