Pacquiao vs. Marquez IV
Dec. 8, 2012 // 9 p.m. ET (HBO PPV)
MGM Grand, Las Vegas
AP Photo/Jae C. Hong


Some fighters concentrate their efforts into a few rounds and merely survive the rest. That's not the case for either Pacquiao or Marquez. Both have seemingly boundless energy, otherworldly endurance and what would appear to be independent motors in every limb. Marquez, 39, defies the very laws of nature when you consider his age. The changes in rhythm, the confounding volume of combinations, the ability to catch a second wind and the power that never loses steam -- together they make each man a true marvel in this department.

Advantage: Even

Written by Bernardo Pilatti