Power and speed aren't enough to overcome someone who is strategic, who knows what you'll do before you do it and can turn it on you; someone who is mentally engaged and combines the whole package.

I studied every move, I became fascinated by thinking what I could have done differently. And I take that approach now as a professional. I am on it, all the time, never stop thinking, learning. You don't get to be world champion unless you do that.

I think we can be our own gods. I believe in myself.

I don't use machines - animals don't use machines.

I have unemployed my girlfriend. She had a job working for a cardiologist and now she can hang out, put her feet up, buy all the things she wants, have a nice breakfast with you and me in the Four Seasons. Any fights in families like mine come from everyone worrying about money. I'm taking all those worries away. That makes me feel happy, makes me really proud of what I do.

It makes a difference when you've got more than two months versus two weeks to train for a particular opponent.

Whoever said it's tough at the top is talking absolute sh*t.