Anthony Joshua has defeated Kevin Johnson with a second-round knockout at the O2 Arena,

Johnson was widely tipped to be the biggest test of Joshua's career, but the Englishman made light work of his opponent to bring his record to 13-0, with 13 knockouts.

A right hook in the first round sent Johnson to his knees, but the 35-year-old continued into the second round.

Joshua continued to dominate in the second, and the fight was stopped after Johnson failed to cope with a series of uppercuts.