Former two-time heavyweight champion Anthony Joshua, 32-years-old, explains that he's still fuming over the September loss to Oleksandr Usyk.
Usyk outboxed Joshua over twelve rounds to capture the IBF, IBO, WBA, WBO world titles at Tottenham Hotspur Stadium.
Joshua has since exercised an immediate rematch clause, with the second fight being targeted for the first quarter of 2022.
"I know I can be better than that night," Joshua old BBC Sport.
"It's easier to say than it is to do, but within my heart and soul, my brain and body, I truly feel I've got a lot more to give. I'm angry. It's growing, but it's fueling me every day."
"I think people still recognize me as champion, even though I haven't got the belts round my waist. They know I've got the capability of becoming champion."
Joshua admits that he's working with new trainers to secure revenge in the upcoming fight.
When Joshua was stopped by Andy Ruiz in June of 2019, he made adjustments in the gym to reclaim his belts from Ruiz in December of the same year.
"I had to make changes," Joshua said. "If you remain the same, you get the same results.
"I've got to look at myself, I can only be accountable for me. I'm angry at myself and the only way I can be in a better place is to get myself right by going out there and performing. It's going to be like this for a few months. I do things with a smile on my face, but behind that there's a lot of tension brewing and the only way to get it out is by training and performing."
Joshua would explain that he's not even thinking about WBC world champion Tyson Fury or any other fighter not named Usyk - he only wants to avenge his recent loss.
"I can't keep chasing what's not in front of me. What's in front of me is to become three-time heavyweight champion of the world, and that's the motivation," Joshua said.