yeah Klitschkos have the highest KO % in the Heavyweights. One of the Klitschkos fought Shannon Briggs in October 2010 and destroyed him. Briggs didnt get knocked out, but 2 bones underneath his eyes were broken. It was a decent fight. I cant see Haye even being a fair fight against either Klitschko, Haye will get destroyed by KO for sure.