http://www.frankwarren.tv/boxing/in...ora-challenges-klitscko-for-world-titles.html "Dereck Chisora has done what David Haye didn't do - sign to fight not one, but BOTH Klitschko brothers." "The unbeaten Londoner first takes on WBO/IBF world heavyweight champion Wladimir Klitschko on December 11 in Mannheim, Germany, and if he wins then he could face Vitali, the WBC world champion, next."