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

I think that boxing is actually not as dangerous as the politics. In boxing, you're gonna get a bloody nose or a black eye. In politics you can obviously get either dioxin in the food or bullet in the head.

That's the most terrible mistake you can make: to relax. It's difficult to become a champion, but it's more difficult to maintain it for many years because you're getting too comfortable.

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

I've fought everybody without ducking anyone. I have beaten 10 undefeated guys, and I never was comparing myself to the greatest in the sport. I was not thinking of breaking any records. I'm just enjoying my time in boxing.

[Anthony Joshua] is the best man in the division and I believe this excitement speaks for itself. This is what the fans want and this fight must 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.