If he wins he becomes a national hero by getting rid of Wladimir Klitschko.
Still, Boente said he was confident the Wladimir Klitschko-Haye fight will eventually be made.
Haye said he was gloomy about the possibility of fighting Wladimir Klitschko in the future.
In 20-30 years time no-one will remember my T-shirt, they'll remember the day I violently destroyed Wladimir Klitschko.
However Chisora insists he will not step aside for Haye after Wladimir Klitschko's withdrawal from their planned title bout.
"I always believed that I would fight Wladimir Klitschko, and my faith has been repaid, " added Chisora, the British and Commonwealth champion.
Wladimir Klitschko, who together with his brother Vitali has dominated the heavyweight class for years, might have to tune in from bed.
World heavyweight boxing champ Wladimir Klitschko's facial expression was one of disbelief.
But how would he fare against Ukrainian duo Vitali or Wladimir Klitschko?
After IBF and WBO champion Wladimir Klitschko pulled out of a title defence against Derek Chisora, his US advisors met with Haye's American advisors.
For starters, there are two of them, Eastern-Europeans, good-looking brunettes, about 6.7 foot tall titans: Vitali Klitschko and his younger brother, Wladimir Klitschko, known as Dr. Steelhammer.
London's Haye, 27, destroyed Wales' Enzo Maccarinelli in March to become the undisputed cruiserweight champion and plans to have two fights against top-10 ranked heavyweights before challenging IBF and WBO champion Wladimir Klitschko in 2009.
Britain's WBA heavyweight champion David Haye hopes to take on Wladimir Klitschko in July before meeting his brother Vitali - the WBC champion - in the Londoner's final fight before retiring ahead of turning 31 in October.
However, they could not come to an agreement on a date and site for the fight because of conflicting schedules between RTL, the German network that features Wladimir Klitschko's fights, and Sky, the British subscription network that televises Haye's bouts on Sky Box Office pay-per-view.
Taffet confirmed to BBC Sport Online that talks had taken place between Lewis' camp and the representatives of Wladimir and Vitali Klitschko, but nothing further has arisen.
Briton Haye, 29, says he now wants to fight either WBC champion Vitali Klitschko or his brother Wladimir, who is the WBO, IBF and IBO champion.
He had hoped victory over Sosnowski would lead to a shot at Vitali Klitschko or his younger brother Wladimir, owner of the IBF and WBO belts, but now Harrison will have to consider other options.
Klitschko, a heavyweight champion like his younger brother Wladimir, said that Ukrainians had rallied in support of the government to make sure the commitment to stage the event would be fulfilled.
Haye has already seen one bout with Klitschko fall through and also pulled out of a June meeting with Klitschko's younger brother, IBF and WBO champion Wladimir, because of a back injury.
Vitali Klitschko is the current WBC heavyweight champion, while his younger brother Wladimir owns the IBF and WBO belts.
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