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What happened to Mayweather’s RIZIN fight? Chael Sonnen says Floyd made a ‘tremendous mistake’

To start from the beginning, back in September Floyd Mayweather Jr. began teasing the idea of a Manny Pacquiao rematch. However, before that fight would happen, he said, he’d be taking part in a “huge boxing event,” in Tokyo. Adding that fans should “stay tuned” for more details.

Two months later and it seemed that the huge tune-up fight had come to fruition, but in a way that entirely shocked the combat sports world. Mayweather wasn’t going to be ‘boxing’ – at least not entirely. Instead he’d be competing in a ‘special rules’ bout against 20-year-old phenom, and world-class kickboxing champion, Tenshin Nasukawa.