( CNN ) -- World heavyweight champion Wladimir Klitschko has told reporters that he believes rival David Haye is only bluffing with his threats to quit boxing in October . International Boxing Federation ( IBF ) and World Boxing Organization ( WBO ) champion Klitschko will defend his titles against Dereck Chisora on April 30 , prompting World Boxing Association ( WBA ) champion Haye to announce that the unification fight between the duo will now not happen because he intends to retire when he turns 31 later this year . But Ukrainian Klitschko has poured scorn on Haye 's claims , saying : `` This is total nonsense and he is playing the media . `` He will not retire because he is a liar . He has no legacy whatsoever from boxing -- beating Audley Harrison has not given him a legacy . `` David Haye has accomplished nothing in the heavyweight division other than to present himself with his stupid t-shirt and comments , '' Klitschko continued . `` This guy will eventually fight me because everything coming out of his mouth is a lie , but if he does retire , he will be a loser with no legacy in the heavyweight division at all . '' Haye made the comments after Klitschko chose to honor an agreement to face the Briton 's compatriot Chisora , in a fight that was postponed from last year after Klitschko suffered a back injury in training . However , Klitschko maintains that if he beats Chisora , he can still fight Haye later in the year . The Ukrainian added : `` I do n't need a half a year to prepare for Haye . Me facing Chisora first is good promotion for the fight because the guy is also British and also very loud . '' Haye could be forced to fight mandatory WBA challenger and former world champion Ruslan Chagaev , with a preliminary date set for July 2 , although Klitshcko maintains that could be side-stepped . `` I do n't take David Haye as a super-special fight . I 'm always in shape anyway . He could give Chagaev step-aside money and then I 'm going to be there with nobody to fight , '' continued Klitschko . `` Because of our history before , I would fight him on July 2 and we would work on the contract , but I would still fight Chisora first . ''
He also claims David Haye is only bluffing with his threats to quit boxing . Briton Haye maintains he will retire in October without facing Ukrainian Klitschko . Haye made the claims after Klitschko 's decision to fight Gabriel Chisora in September .