Has a FIBA World Cup game ever ended 89-53?
Exactly once. On November 28, 2020, Belarus beat Cyprus 89-53, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 89-53 in league history.
That makes 89-53 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 90-53 has happened never and 89-54 has happened never.