"People forget that up until he fought Kostya Tszyu he hasn’t fought anyone credible. He was the most protected species I have ever seen. He beat Kostya, so what? It's all about timing. He beat Kostya when he was ready to be taken. It happens all the time. It's like when Tszyu beat up the great Chavez, it was all about timing. Chavez was ready to be taken. On his best, Tszyu would have blown Hatton away in two rounds. I know this for a fact because I have done a lot of sparring with Kostya when he was at his best." excerpt from NDou interview

http://www.boxingbuzz.com/peter-klitschko/wheatley7.htm