Manny Pacquiao retreats to his corner after knocking out Ricky Hatton during the second round of their 2009 fight. Will Pacquiao have as much success against Timothy Bradley when the two face off on Saturday? (Neil Leifer/SI) 
GRAHAM: Crash course - all you need to know for Pacquiao-BradleyPOLL: Make your prediction for Saturday’s Pacquiao-Bradley fightGALLERY: Pacquiao and Bradley arrive in Las Vegas

Manny Pacquiao retreats to his corner after knocking out Ricky Hatton during the second round of their 2009 fight. Will Pacquiao have as much success against Timothy Bradley when the two face off on Saturday? (Neil Leifer/SI) 

GRAHAM: Crash course - all you need to know for Pacquiao-Bradley
POLL: Make your prediction for Saturday’s Pacquiao-Bradley fight
GALLERY: Pacquiao and Bradley arrive in Las Vegas