Floyd Mayweather Jr announced a bizarre fight on Sunday night against young Japanese kickboxing sensation Tenshin Nasukawa.
The fight will take place in Japan on 31 December, after the undefeated boxer signed a deal with RIZIN Fighting Federation, a Japanese mixed martial arts company.
The rules for the bout are yet to be confirmed, however, the bookies already have Mayweather 2/9 to win, while Nasukawa is 11/4.
The 41-year-old made it 50-0 in his boxing career as he came out of retirement to face UFC fighter Conor McGregor in a boxing match in 2017.
Speaking about the upcoming fight, the American said: "I wanted to do something different. I wanted to display my skills outside the US and be in a special fight. I want to give the people what the want - blood, sweat and tears."
Mayweather's counterpart, Nasukawa, is only 20-years-old and has competed in both Kickboxing and MMA, where he has 27-0 and 4-0 records.
"It was a surprise offer but I accepted without hesitation," said the Japanese youngster.
"It's the biggest moment in my life and I want to be the man who changed history. I'll do that with these fists, with one punch. Just watch."