HEAVYWEIGHT -
WBC - Vitali Klitschko 36-2 (35 KOs)
WBA - Ruslan Chagaev 24-0-1 NC (17 KOs) / Nicolay Valuev 50-1-0-1 NC (34 KOs)
IBF - Wladimir Klitschko 52-3 (46 KOs)
WBO - Wladimir Klitschko 52-3 (46 KOs)
Come on man. You have definatly heard of Wladimir Klitschko before. The Russian dude? I don't even follow the sport and I could instantly recognize him.