manny pacquiao and floyd mayweather meet in las vegas on may 2 in ` the fight of the century '
filipino pacquiao was given a speed ball with the face of floyd mayweather on it on monday .
pacquiao then got down to business with a training session at wild card boxing gym .
watch : pacquiao sings and directs his own music video for walk-out tune ahead of mega-fight with mayweather .
read : ufc icon ronda rousey backs pacquiao as fast and furious 7 star visits filipino ahead of mayweather fight .