Manny Pacquiao vs. Marco Antonio Barrera II, billed as Will to Win, was a professional boxing match contested on October 6, 2007, for the WBC International super featherweight championship.

[1] The bout took place at the Mandalay Bay, Las Vegas, Nevada, United States and was distributed by HBO PPV.

The two had previously fought in November 2003 with Pacquiao stopping Barrera after 11 rounds.

The fight was announced after Top Rank and Golden Boy Promotions settled their lawsuit over the promotional rights for Pacquiao fights on June 29, 2007.

[5] Barrera briefly retired after the fight but returned over a year later in November 2008 to face Sammy Ventura.