Juan Manuel Márquez vs. Manny Pacquiao II, billed as Unfinished Business, was a professional boxing match contested on March 15, 2008, for the WBC Super featherweight championship.

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

This was Pacquiao's first world title bout since his December 2004 victory over Narongrit Pirang.

Pacquiao defeated Márquez via split decision, knocking down Márquez once in the third round.

[5] With the victory, Pacquiao became the first Asian boxer to win world titles in four different weight classes.