I learned in my Ph.D. the discipline I needed to be successful. Most boxers are not that disciplined. They have talent, but the self-organization - the ability to schedule yourself and your priorities - is lacking. My studies were about the control of training on both the psychological and the physical side.

Nobody is born as a champion. You have to earn it through hard work. Get started!

I'm boring but effective.

I think that there's only one nationality and one language in the sport, and you call it performance.

There's certain things that you cannot cross, no matter who you are, what you're doing or where you're coming from.

Who's gonna win between two brothers? The Klitschko mother's gonna win because she said it won't happen.

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.