Wladimir Klitschko says he feels like a younger man as he prepares for his rematch with Tyson Fury in Manchester.
The Ukrainian lost his WBA Super, WBO and IBF heavyweight titles to Fury in Dusseldorf in November, only the fourth defeat of his career and first since 2004.
The pair are set to do battle again on July 9, and the 40-year-old is relishing the unfamiliar role of challenger as he looks to regain his belts.
"I love it. I just feel younger. I feel better. Believe it or not, I'm enjoying the position I'm at right now. I'm relieved. I'm relaxed but alert," he told Sky Sports.
"I want to show to myself and to my fans that I can become a champion again and can solve that challenge positively with a positive end for me.
"I never had a doubt before I made the decision and executed the option on the contract of a rematch. As a matter of fact, I'm very happy about it.
"I'm enjoying the stage and enjoying being an athlete. I know it's not going to last forever but at the current stage, I do love what I'm doing and I do like where I'm at right now as a challenger.
"I'm happier and I have a chance to make it straight and bounce back. I feel free. I do feel less pressure and just reloaded.
"It will be a boxing match that will be so enjoyable for the fans and for me as well. I will knock Tyson Fury out."