Has a FIBA World Cup game ever ended 82-71?
It has. 82-71 has been a FIBA World Cup final 2 times in 2,041 games. The first was Bulgaria beat Portugal on August 2, 2017; the latest was Senegal beat Mali on September 15, 2018.
That makes 82-71 the 222nd most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 83-71 has happened 1 times and 82-72 has happened 5 times.