Timothy Bradley has pledged to 'kick Amir Khan's ass' once he has dealt with Manny Pacquiao.
The American twice rejected a bout with Khan, before stepping up from light-welterweight to challenge Pacquiao for his WBO welterweight strap.
Bradley will now go toe to toe with Filipino at the MGM Grand in Las Vegas in the early hours of tomorrow morning.
However, the unbeaten American has promised to fight Khan after facing criticism from the Bolton fighter, who is a stablemate of Pacquiao at the Wild Card Gym.
"Before I die I'm gonna fight this dude Khan," said Bradley. "That's a promise.
"I've got a bigger fight here but once I've kicked Manny's ass I'm going to kick his."
Bradley has 12 knockouts from his unblemished 28-fight record.