Floyd Mayweather knocked down Tenshin Nasukawa three times in the first round as he beat the Japanese kickboxer in an exhibition match New Year’s Eve worth a reported $9m.
American superstar Mayweather, 41, was smiling during the short-lived contest in Tokyo as he floored the 20-year-old with ease.
The fight, scheduled for three three-minute rounds, ended with Nasukawa in tears as his team threw in the towel.
“It was all about entertainment – we had a lot of fun,” said Mayweather, who beat UFC’s Conor McGregor in a boxing match in August 2017.
“They wanted this to happen in Japan, so I said ‘why not?'”
Both fighters were undefeated coming into the much-criticised contest, which had Mayweather carrying a 4kg (9lb) weight advantage and was delayed by several hours.
And after beating Nasukawa in the exhibition match, five-weight world champion insisted: “I’m still undefeated; Tenshin is still undefeated. Tenshin is a true champion and a hell of a fighter.”
Addressing the Japanese fighter, he added: “Hold your head up high.
“I want the fans around the world to support Tenshin, he’s a great guy and a great champion.”