Floyd Mayweather and Welshman face off in Las Vegas on May 2 . Joe Calzaghe believes Mayweather 's unbeaten record is a burden . Despite that , the Manny Pacquiao thinks Mayweather will beat his opponent . READ : Ricky Hatton gives his prediction to Jeff Powell ahead of the fight . READ : Floyd Mayweather vs Welshman tickets FINALLY go on sale .
Floyd Mayweather and Manny Pacquiao face off in Las Vegas on May 2 . Joe Calzaghe believes Mayweather 's unbeaten record is a burden . Despite that , the Welshman thinks Mayweather will beat his opponent . READ : Ricky Hatton gives his prediction to Jeff Powell ahead of the fight . READ : Floyd Mayweather vs Manny Pacquiao tickets FINALLY go on sale .