Usyk, the mandatory challenger, will attempt to cause an upset and take Joshua's WBA, IBF and WBO belts at the Tottenham Hotspur Stadium and it's clear to see in recent photos he's left no stone unturned as he seeks heavyweight glory.
The 34-year-old has already had questions raised about him in the heavyweight division after his last fight with Derek Chisora unexpectedly went 12 rounds.
Chisora started the fight last October brilliantly but faded as the bout went on, with Usyk taking a unanimous decision victory.
The Ukrainian weighed in at 217lbs before that victory back in 2020 and he has aimed to bulk up even further ahead of this fight with Joshua.
Usyk has been doing a lot of power training ahead of the fight, with power being one of the main questions people had after the Chisora bout. He has also posted pictures with large plates of food as part of his goal to add some pounds.
Take a look below and you can see a handful of before and after shots in terms of his transformation.
He recently showed that he weighed 230lbs, and as per his recent training photos, his incredible body transformation is complete.
Ahead of the fight, Usyk has insisted that Joshua will be in for a shock if he thinks his title defence will be plain sailing because of his poor performance against Chisora.
He told The Sun: "I am very grateful to all those that support me and everything else but they expect too much from athletes.
"Some of them very much do not understand what is happening in the ring, how difficult it is or, in some cases, how easy it is. People just have an image that they think up.
"The fact is I boxed Derek for 12 rounds but he is actually a very difficult guy to beat. If you look at his two fights with Tyson Fury then he has gone 22 rounds with him."News Now - Sport News