Wladimir Klitschko does not rate David Haye as the most difficult test of his career as the pair prepare for their July 2 heavyweight showdown in Hamburg.
"Wladimir thinks that he (Haye) is not the toughest opponent he has faced but let's see," said the Ukrainian's manager Bernd Bonte.
"I think it is a very interesting fight and it is the first time we have had a unification fight in many years."
Bonte acknowledged the bad feeling between the two fighters - "They definitely don't like each other. That's for sure" - and insisted IBF, IBO and WBO champion Klitschko is ready for the fight despite a recent abdominal injury.
"Everything is fine and all of his problems are gone," Bonte told Sky Sports. "He went to a short training camp in Florida and everything is OK."
Bonte rejected reports that British fans of WBA world heavyweight champion Haye were not being given an equal chance to secure tickets for the fight in Hamburg.
"The ticketing was merely a problem in the media and it is first come first serve basis - I'm very happy that many British fans will come and hopefully we have some atmosphere here in Hamburg."
Bonte also defended the billing for the fight which seems to favour Klitschko.
"I think that if you look at the promotion from an objective view on this fight Wladimir has been champion since 2006 and I see four belts whereas David Haye has only one," he added.