World heavyweight champion Wladimir Klitschko has admitted that he is driven by a fear of losing when he trains to defend his titles.
Klitschko is back in action on Saturday, November 10 in Hamburg against unbeaten Pole Maruisz Wach.
The Ukrainian believes that he is in peak physical condition and is unstoppable if he maintains this level of focus.
He told Boxing Scene: "Yes I am afraid of losing, but it motivates me to be better, to be faster and superior.
"I am healthy and I love what I do. I know what I've put myself through in the last few months, for this moment in battle, where I can prove I am the best man.
"Wach is extremely dangerous because of his size and range, and he's undefeated. But regardless, I am convinced that I can beat him."