Anthony Joshua will face a different kind of test this weekend, fighting Robert Helenius on short notice in London.
Joshua, 33, was set to take on Dillian Whyte this week, in a rematch eight years in the making, but Whyte returned an adverse finding in a drug test on Saturday. As a result, he lost his chance to avenge his knockout loss to Joshua, who will now fight Helenius at the O2 Arena.