Retired Joe Calzaghe recently watched David Haye work out in preparation for his July 2 bout with Wladimir Klitschko, and lavished the heavyweight contender and titlist with praise:

"He's such a dynamic and exciting fighter to watch - quick, sharp and classy. His punch power on the pads is frightening and everything is thrown with speed. He's moving like a middleweight with heavyweight power right now."

Haye (25-1, 23 KO) faces Klitschko (55-3, 49 KO) in Hamburg next Saturday in one of the most highly-anticipated and hyped fights of the year, and the biggest heavyweight clash in years. I don't doubt that Calzaghe's assessment of Haye in the gym is honest -- I'm sure he looks like an unstoppable force without the best heavyweight in the world in front of him pumping that jab of his. But can Haye live up to the talk of excitement and flash? At this point, with all the talk and the retirement promise, he pretty much has to make this an exciting fight or his reputation is going to take a huge hit.