"For 36 rounds, a razor-thin margin has separated Manny Pacquiao and Juan Manuel Marquez. What happened in the last 12 could hold the key to victory in their fourth battle."

1. After three fights, they know each other inside out.

"Marquez came out moving to his left, away from Pacquiao's most dangerous weapon. This forced Pacquiao to reach, leaving him open to counters. Pacquiao responded by throwing his deadly left hand from angles. The early exchanges were brief and calculated."

2. Mid-fight adjustments alter the dynamic.

"As the fight wore on, Marquez turned aggressor and scored with hard right hands. Pacquiao used speed and footwork to throw combinations."

3. When all else fails, expect a brawl.

"With each move countered, both fighters abandoned strategy for open warfare. Pacquiao eked out a controversial majority decision. Will Pacquiao's record against his rival remain unblemished? Or will Marquez finally find validation? All questions will be answered under the lights."