Floyd Mayweather beat Japanese kickboxing phenomenon Tenshin Nasukawa by a technical knock-out on Monday in the first round of a New Year’s Eve “exhibition” bout that brought the US boxing superstar out of retirement.

Mayweather floored Nasukawa, a kickboxer less than half his age, three times in the first round of the three-round contest before the Japanese fighter’s trainer rushed in to stop the fight.

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