Next up at the venue is Alexander Povetkin, an experienced Russian who has lost only once as a professional. He has won 24 of his fights by knockouts while 10 have ended in his favour by unanimous decisions.
However, he slimmed down for his last bout versus Joseph Parker.
Russia's 39-year-old Povetkin, whose reputation will never fully recover from the damage caused by two failed drug tests, secured Saturday's fight by becoming Joshua's mandatory challenger five years after last fighting for a world title, and is unlikely to do so again if he suffers his second defeat.
Standing at 6-foot-6 with an 82-inch reach, the 28-year-old Joshua has a noticeable size advantage over the 6-foot-2 Povetkin.
Povetkin held the WBA heavyweight title as recently as 2013, and is the current WBA Inter-Continental champion.
Heavyweight world titleholder Deontay Wilder and former world champion Tyson Fury finalized their deal Friday night, and Premier Boxing Champions announced the fight would take place December 1. The WBA ordered the fight after Povetkin knocked out David Price on the Joshua-Parker undercard.
Where: Exclusively on DAZN, which is available at $9.99 per month following a one-month free trial - making tonight's fight a free viewing for all.
Meanwhile, Joshua was over a stone-and-a-half heavier than Povetkin as they weighed in for their fight at Wembley on Friday, Skysports reports.
Joshua has weighed in at 17st 8lbs (246lbs) whilst his opponent weighs in at 15st 12lbs (222lbs).
Povetkin said after the weigh-in he was not bothered by the development.
"I'm a physical, strong guy".
"I didn't see anything in his (Joshua's) eyes". I'll absorb all the power and then I'll detonate.
"And he also said to me in private message saying, 'Oh, I'm going to make you wait two years.' I'm like, 'Why?"
"I think that is more of a 50/50 fight".
"And as a friend I was anxious, not for his mental health, because mentally he needs to do this or he's going to sit on his couch in years pondering". My coaches wonder what I'm doing in sparring, so sometimes I'll tell them to hit me because I know how to throw punches.