Two rematches headline the Manny Pacquiao vs. Mario Barrios undercard, while former champions and young contenders look to impress. Here's a breakdown of all the action on the Pacquiao vs. Barrios card.

As the pre-fight documentary cameras for Prime Video's "Gloves Off" followed Manny Pacquiao in Las Vegas in late May as he walked the hallways of the MGM Grand en route to the press conference announcing this weekend's return to boxing after nearly five years,