It’s finally happening. Boxing great Floyd Mayweather has agreed to fight MMA champion Conor McGregor in McGregor’s professional boxing debut. With 49 wins and no losses, the 40-year-old Mayweather is unsurprisingly the favorite, though UFC’s Dana White says McGregor, a tattooed 28-year-old from Ireland, is absolutely certain he’ll wipe the floor with the more experienced boxer. Commentators say that if Mayweather goes down in the August 26 bout — his first fight in two years — it could damage his legacy. Either way, both men are expecting a huge payout from the spectacle.