You can take your fitness seriously, but not yourself. That's the most difficult part: not to relax. That's the most difficult challenge I'm facing every fight.

There are 49 guys that got bored to sleep on my record, so they got knocked out by it.

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

I never fought in my life outside of a ring.

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.

On your way to the top, you always get some chriticism. Criticism is a great motivation.

I would say that Roger Federer is pretty amazing. And Manny Pacquiao - he's such a tiny, little lightweight guy, but the way he fights makes people so excited.