On the experiences he had sparring with his brother Wladimir earlier in their careers:
“You know what, believe it or not we never fight with each other. I like my brother very much and a couple of times we tried sparring together, and we’d always get injuries. I don’t why. Maybe it’s because we have the same blood and that we’re like magnets where plus-to-plus doesn’t work and minus-to minus also doesn’t work. Last time we sparred, Wladimir made a side step and I broke his bones"