Daniel Dubois didn't have to dethrone anyone to become a world heavyweight champion. If he successfully defends his IBF belt on Saturday by beating fellow Briton Anthony Joshua in front of 96,000 fans at Wembley Stadium, Dubois might just transform himself into boxing’s next big thing. “I’m getting used to the idea that I’m the world champion but I think I need to legitimize it by beating AJ," Dubois told The Associated Press in an interview.