Anthony Oluwafemi Olaseni Joshua is a British professional boxer. He is a two-time former unified world heavyweight champion, having held the World Boxing Association (WBA), International Boxing Federation (IBF), and World Boxing Organization (WBO) titles twice between 2016 and 2021. He also held the International Boxing Organization (IBO) title twice during that reign. At regional level, he held the British and Commonwealth heavyweight titles from 2015 to 2016.

In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all recognized major organisations by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 19 boxers to hold all four titles simultaneously.