Has a FIBA World Cup game ever ended 61-52?
Exactly once. On October 25, 1954, Brazil beat Paraguay 61-52, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 61-52 in league history.
That makes 61-52 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 62-52 has happened never and 61-53 has happened never.