Ukraine`s Vladimir Klitschko retained his world heavyweight titles by beating Russian Chagaev thanks to a technical knockout after the ninth round at the Schalke 04 soccer stadium on Saturdaym according to Reuters.

Klitschko, 33, held on to his IBF, IBO and WBO belts when the referee stopped the fight before the start of the 10th round in front of 61,000 fans with the Uzbek WBA champion-in-recess bleeding from a large cut above his left eye.