Vitali Klitschko's manager claims David Haye dodged a fight against the Ukrainian as he was too scared to take him on.
According to Bernd Boente, manager of both Klitschkos, Haye was offered the chance to fight WBC heavyweight champion Vitali in September but instead chose to take the "easier" option of taking on Dereck Chisora on July 14.
"There was a contract from us for (Haye) to fight Vitali in September but he chose to fight Chisora instead because it's an easier task," Boente told Press Association Sport. "I think he never really wanted to fight Vitali. The guy is always talking. He barks like a dog and he does that because he is mostly afraid."
Haye has a long-running rivalry with the Klitschkos, who have dominated the heavyweight division for a large part of a decade.
The 31-year-old has goaded the Ukrainians by launching a phone application in which he beheads a fighter widely thought to be one of the brothers and he also once wore a t-shirt that depicted him holding aloft the severed heads of the famous heavyweight pair.
Haye's only fight against one of the brothers - last July's clash against Wladimir - ended with a significant points defeat for the Londoner - one he partly blamed on a broken toe.
The controversial former WBA champion has always claimed he is determined to unify the division by beating both brothers but that looks very unlikely now as Wladimir insists he will not fight him again and Vitali looks set to retire in October if he is elected to Ukraine's parliament.
"I don't think it (Haye-Vitali) will happen," Boente added.
"It will definitely not happen in September because we are already talking to a couple of different opponents for then and it is too close for Haye to fight him after his fight against Chisora.
"Wladimir will never fight him again. Why should he? There are no questions left for him to answer and Vitali... If he is elected in October he will quit his career, for sure."