Team Melli defeated its rival 71-64 at Al-Gharafa Sports Club Multi-Purpose Hall in Doha, Qatar.
Iran’ Mohammad Yakhchali topscored the match with 27 points.
Mohammed Alsuwailem finished with 13 points for the Saudi Arabian team.
This match was rescheduled from the previous window of the FIBA Asia Cup 2021 Qualifiers earlier this year.
Iran is scheduled to play Syria on Monday.
There are 24 teams competing in the FIBA Asia Cup 2021 Qualifiers and top two teams in each group will qualify directly to Asia Cup 2021.