Floyd Mayweather Jr. is set to put his undefeated record on the line against Andre Berto on Saturday night.
The welterweight title fight hasn't generated as much hype as most "Money" bouts, but that doesn't take away from its importance.
Mayweather needs a victory to reach 49-0, a record that would tie the legendary Rocky Marciano.
A loss for such an overwhelming favorite would do serious damage to his lasting legacy.
And, on the flip side, pulling off the massive upset would be the top moment of Berto's career.