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 in Dusseldorf on Saturday, according to Eurosport. The Ukrainian, who holds the IBF, IBO, WBO and WBA versions of the championship while his older brother Vitali has the WBC crown, took his career tally to 50 knockouts from 60 fights 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.Klitschko, whose last defeat stretches back to 2004, inflicted more punishment in the next two rounds, his left working to open his opponent up as Mormeck ducked low to avoid his wider reach, before finishing him off in the fourth.
