article_snippet.sent: Pacquiao works up a sweat shadow boxing during preparations for Pacquiao clash with Floyd Mayweather .
article_snippet.sent: With Pacquiao eyes closed and grimacing with effort, Pacquiao ramps up Pacquiao shadow boxing routine .
article_snippet.sent: Yet Pacquiao warns Floyd Mayweather that if does beat Pacquiao and wants to go on to eclipse Rocky Marciano's historic record of retiring as undefeated world champion after 49 straight wins, then Pacquiao should 'stay away from our own Amir Khan.'
article_snippet.sent: Pacquiao takes on Floyd Mayweather six years to the day after knocking Ricky Hatton out at the same venue .
article_snippet.sent: Mayweather-Pacquiao will be exclusively live on Sky Sports Box Office, late Saturday, May 2.
highlights_snippet.sent: But Pacquiao still expects Floyd Mayweather to win May 2 mega-fight .
  