Joe Parker article on sparring with Klit:
http://tvnz.co.nz/othersports-news/george-berry-why-parker-sparring-heavyweight-champion-wladamir-klitschko-6276123
http://tvnz.co.nz/othersports-news/george-berry-why-parker-sparring-heavyweight-champion-wladamir-klitschko-6276123