Floyd Mayweather came out of retirement briefly to score a lucrative victory in an exhibition boxing match in Japan over kickboxer Tenshin Nasukawa that will do more for his bank balance than it did for the reputation of combat sports.

Mayweather blitzes Tenshin in Japanese boxing exhibition

Floyd Mayweather has won world titles in five different weight classes and is 50-0 in an unparalleled boxing career but the American could be set for a stunning detour into the world of mixed martial arts after signing with Japanese promoters RIZIN Fighting Federation.

Floyd Mayweather ready for Japan fight, whatever the rules

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Mayweather blitzes Tenshin in Japanese boxing exhibition

Floyd Mayweather ready for Japan fight, whatever the rules