Mike Tyson vs. Buster Douglas, billed as Tyson Is Back!, was a professional boxing match that occurred at the Tokyo Dome on February 11, 1990. The event is historically significant, as the then-undefeated, undisputed heavyweight champion Tyson lost by knockout to the 42–1 underdog Douglas. The fight is widely considered one of the biggest upsets in sports history. Japan paid $6 million to boxing officials for the privilege of staging Mike Tyson's fight in Tokyo.

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