Joshua joins Muhammad Ali and Leon Spinks as the only men to be professional heavyweight world champions while still reigning Olympic champions.
Ali, then known as Cassius Clay, won light-heavyweight gold in 1960 before dethroning Sonny Liston in 1964; Spinks won light-heavyweight gold in 1976 before dethroning Ali in 1978, in only his eighth paid fight.
While nobody has won a world heavyweight title faster than Spinks, Joshua surpasses Ali (20 fights), Lennox Lewis (22) and Mike Tyson (28).
Frank Bruno, Lewis, David Haye and Bob Fitzsimmons complete the list of Britain’s heavyweight world champions. Herbie Hide and Henry Akinwande were WBO title-holders when the belt was not taken seriously by many of the elite fighters in the division.