unbeaten floyd mayweather faces more pressure than manny pacquiao when the pair meet in las vegas on may 2 but he will still be victorious , says joe calzaghe .
it is being billed as the fight of the century , and is worth at least $ 180million to mayweather and pacquiao respectively , but former undefeated world super-middleweight and light-heavyweight boxing champion calzaghe is confident he can predict the outcome that