By Mark Vester

WBO/IBF/IBO heavyweight champion Wladimir Klitschko is a bit worried when it comes to making a deal for a unification bout with WBA champ David Haye. On Monday Klitschko released a video baiting Haye to accept a fight. The British fighter's manager, Adam Booth, will begin negotiations with Klitschko's management this week. Last year Haye had agreed to fight Wladimir in June and then wanted to fight older brother Vitali Klitschko in September. The British boxer withdrew from both fights. Wladimir doesn't trust Haye's promise to follow through if the two sides reach a deal.

"Haye can not be trusted. We twice wanted to fight him but he always pulled out. He had promised Chelsea Football Club's stadium (Stamford Bridge) then he said 'Let's do it in June' (in Germany)... he just can not be trusted," Klitschko said to Reuters.

Wladimir doesn't want to accept any title defenses. He wants to unify all of the titles under the Klitschko name and Haye is the last man standing. Wladimir promises to fight a more aggressive style against Haye.

"It is now time to unite all belts under one name - the Klitschko name," Wladimir said. "It is definitely going to be a big deal for television," said the Ukrainian. "It is going to be an historic event when all the belts will have one name. I am the world champion and I will prove it. Haye is good and he will challenge me but this time you will not see defensive boxing as in my last few fights. I will be more aggressive."

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