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Fewest fights to win the world heavyweight boxing championship

Fewest fights to win the world heavyweight boxing championship
Who
Leon Spinks
Where
United States
When
15 February 1978
Leon Spinks (USA) holds the record of winning the world heavyweight championship with the fewest fights. On 15 February 1978 he outpointed title holder Muhammad Ali (USA) over 15 rounds at the Hilton Sports Pavilion in Las Vegas, USA, to capture the title in just his eighth professional contest.