Muhammad Ali vs. Antonio Inoki, billed as The War of the Worlds, was a fight between American professional boxer Muhammad Ali and Japanese professional wrestler Antonio Inoki, held at the Nippon Budokan arena in Tokyo, Japan, on June 26, 1976. At the time, Ali had come off a knockout victory over Richard Dunn in May and was the undisputed heavyweight boxing champion. Inoki, who had been taught catch wrestling by wrestler Karl Gotch, was staging exhibition fights against champions of various martial arts, in an attempt to show that pro wrestling was the dominant fighting discipline.