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BEIJING, CHINA - MAY 24: Former Heavy Weight Champion Boxer Mike Tyson attends the Great Wall Weigh-in of IBF World Boxing Championship Bout at Mutianyu on May 24, 2016 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - MAY 24:  Former Heavy Weight Champion Boxer Mike Tyson  attends the Great Wall Weigh-in of IBF World Boxing Championship Bout at Mutianyu on May 24, 2016 in Beijing, China.  (Photo by Lintao Zhang/Getty Images)