The IBF Heavyweight World Title, which was won by Tyson Fury on November 28, 2015 when he beat the reigning champion Wladimir Klitschko in an optional defense of this title, was vacated on Tuesday, December 8, 2015 by the IBF as Tyson Fury is unable to make the mandatory defense of the IBF title against challenger Vyacheslav Glaskov because he is contractually obligated to a rematch with Klitschko, which is in direct violation of the IBF/USBA Rules Governing Championship Contests.
