Berlin: Undisputed heavyweight champion Wladimir Klitschko says he plans to become the first boxer in history to hold all four major world titles.


Wladimir Klitschko 

The 38-year-old produced an impressive display in the 17th defence of his world titles on Saturday with a fifth round knock-out of IBF mandatory challenger Kubrat Pulev in Hamburg for his 63rd victory and his last defeat is now a decade ago. Of the world's top four -- the IBF, WBA, WBO and WBC belts -- only the WBC crown, currently held by Canada's Bermane Stiverne, is missing from Klitschko's collection.