sentences:  Wladimir bounced back from a stoppage loss in a prior vacant title attempt, to dethrone Byrd for a second time for his IBF title in April 2006, this time by stoppage in the 7th round.After a series of injuries, Vitali had a career break of almost four years.In his comeback fight in Berlin on October 11, 2008 he defeated Samuel Peter to regain the title of WBC world heavyweight champion.