"I don't promote boxing, I promote people. Boxing is a catalyst to bring people together."

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Mental strength is really important because you either win or lose in your mind. And I'm not solely talking about sporting matches, boxing events - anything you do, you do it first with your mental strength. And you can actually train and develop it, and I am responsible for what I'm saying because I have experience with that.

— Wladimir Klitschko