Volodymyr Klitschko of Ukraine retains his WBO and IBF heavyweight belts (photo video)

World Heavyweight Champion Volodymyr Klitschko of Ukraine has retained his WBO and IBF heavyweight belts in a fight against mandatory challenger Eddie Chambers of the United States. Klitschko knocked out Chambers in the 12th round.

The bout took place in Dusseldorf, Germany, on March 20. Klitschko sent Chambers to the floor with a left hook five seconds before the final bell.