For Floyd Mayweather it is about history as he inches closer and closer to perfection as he stares down the barrel of an undefeated career which hasn't been achieved since the late great Rocky Marciano. However, For Manny Pacquiao it is about vindication as he looks to beat the one man that's eluded him his entire career and capping his career with the ultimate victory as he looks to become the 1 in 47-1.
Both men have sat at the top of the mountain for the last 15+ years and have shared numerous championships and accolades but tonight only one will stay and wear the crown of Boxing's best pound for pound fighter.
The ultimate question tonight is not just who walks out of the ring with the victory but will these two men and ring warriors inspire a new generation of athlete to follow in their footsteps for tonight ultimately represents a chance that this clash of the titans can breathe new life into the sport of Boxing and bring forth a new generation of boxers who are not only gifted in the ring but are entertaining showmen as well.
If the sport of Boxing is to survive beyond tonight it sorely needs a new generation of fighters to walk in the footsteps of these two legendary fighters and blaze a new trail for Boxing's future going forward.
Is tonight the night that Boxing sets forth a new future that will see fighters emerge to the same level of greatness as the two legends in this Fight Of The Century or will this be Boxing's swan song before vanishing into the night never to return to nights like this where the anticipation is off the charts?
Only time will tell.