Paul proclaimed he would be 'sending out contracts' to ensure his wager with the Irishwoman is binding. Taylor is in for by far the biggest payday of her eight-year professional boxing career when she takes on Amanda Serrano for a second time.

Paul (10-1, 7 KOs) has slowly developed into something resembling a competent boxer, adding some legitimate skills to his natural power. But even an aged version of Tyson (50-6, 4

In 1976, Muhammad Ali fought Japanese wrestler Antonio Inoki in Japan. In 2017, Floyd Mayweather, at 40 years old, came out of retirement to fight MMA star Connor McGregor. Mayweather won by TKO after wearing down McGregor in a fight that drew 4.3 million pay-per-view buys with a total revenue of $600 million.