Mayweather crushed Tenshin Nasukawa
Floyd Mayweather knocked down Japanese kickboxer Tenshin Nasukawa three times en route to a first-round stoppage in their boxing exhibition at the Saitama Super Arena.
Mayweather, 41, a former five-weight world champion who retired from boxing with a perfect professional record of 50-0 last year, saw off an opponent 21 years his junior — who had never fought a straight boxing match — in brisk fashion.
In a bout that was scheduled for three rounds just outside Tokyo, Nasukawa lasted only two minutes and 20 seconds before his corner threw in the towel.
Mayweather said in the build-up he expected to pocket $US9 million ($A13 million) from the fight, which headlined an event organisedby Rizin Fighting Federation, a Japanese mixed martial arts organisation.