Boxing world champ Wladimir Klitschko defending titles in September

Heavyweight boxing world champion Wladimir Klitschko will defend his three championship belts against the unbeaten Bulgarian, Kubrat Pulev.

Heavyweight boxing champion Wladimir Klitschko (R), at a training session in Oberhausen, Germany. Photo by CAROLINE SEIDEL/dpa
Heavyweight boxing champion Wladimir Klitschko (R), at a training session in Oberhausen, Germany. Photo by CAROLINE SEIDEL/dpa

The fight will take place on September 6, in Hamburg.

Klitschko, 38, currently holds the WBO, WBA and IBF heavyweight belts.

The Ukrainian successfully defended them in April, knocking out Australia's Alex Leapai in the fifth round in Oberhausen, Germany.

Pulev, 33, is the IBF challenger, but Klitschko's spokesman Lorenz Eichhorn said that, in the event of a defeat in September, Klitschko would also give up the other two belts he holds.

"The Cobra is a challenge for me, with his record of 20 wins (11 by K.O.) and no losses ... So there is definitely no reason to underestimate him," Klitschko said on his Facebook site on Thursday.