Patrik Auda scored 16 points and Blake Schilb added 14 for the Czech Republic in this match.
Behnam Yakhchali had a game-high 23 points for Iran, while Mohammad Jamshidi scored 16 and Hamed Haddadi had 15 points and 10 rebounds before fouling out late for Iran.
Both teams return to play Wednesday, with Iran facing USA and the Czech Republic playing France in Group A matchups.