Wladimir Klitschko boasts an impressive record of 55 wins, three defeats and 49 wins by knockout.
Under the training of Manny Steward, Klitschko has not lost since 2004. He has tightened up his style, and no one has been able to get past his jab. He's been able to protect his suspect chin, and he fights at a controlled pace.
Standing slightly over 6'6" with an 81-inch reach and weighing more than 240 pounds, he is one of the largest heavyweight champions ever.
He also is in an era where the talent pool among heavyweights is low and popularity has waned.
Here is how Wladimir would fare against nine other heavyweight champions. Fights will be 15 or 12 rounds, depending on the era in which his opponent fought.