Vladimir Klitschko knocked out Jean-Marc Mormeck of France with a stinging left-right combination in the fourth round to retain his world heavyweight titles at the Esprit Arena on Saturday.
The Ukrainian took his career tally to 50 knockouts from 60 fights interspersed with just three losses.
Klitschko, 35, had knocked down former cruiserweight world champion Mormeck, who at 1.81 metres is 17 centimetres shorter than the Ukrainian, in the second round with a huge right that sent the Frenchman sprawling.