Has a FIBA World Cup game ever ended 91-80?
It has. 91-80 has been a FIBA World Cup final 3 times in 2,041 games. The first was Greece beat Brazil on August 23, 2006; the latest was Slovenia beat Australia on September 1, 2023.
That makes 91-80 the 96th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 92-80 has happened never and 91-81 has happened never.