I always train and prepare with highest concentration and focus on my next opponent. To me, it does not matter what his name is.

It's not my place to compare myself to greats like Tyson, Frazier or men like that. But I would look at a fighter like Evander Holyfield. He's a great heavyweight who worked his way up through the weight classes to become champion and had to beat bigger men along the way.

The challenge for me is his size because, for the first time in my career, I'll be meeting an opponent who is taller than me and has a longer reach.

All of my fights are planned. I study my opponents from A to Z. How he walks, how he looks, how he speaks, gestures of the human body, which is a certain language that provides you lots of information if you have the ability to read it.

I'm going to give him a pizza face.

I have a Ph.D. in philosophy and sports science. At 14, I went through this really tough Soviet training system. A lot of my roommates got psychologically broken or physically injured. Either you came through, or you were out. I made my Ph.D. work in the field of young athletes aged 14-19 because at this age any human is changing.

Sometimes it's boring because it takes time, but it's enjoyable. So beating up people for a living is really fun.