There's nothing left to do now except fight.

Julio Cesar Chavez Jr. will battle Sergio Martinez for the WBC championship this Saturday night (Sept. 15, 2012) on HBO pay-per-view (PPV) LIVE from the Thomas & Mack Center in Las Vegas, Nevada.

This is their story.

Actually, it's the second half of it. If you missed episode one of HBO 24/7 "Chavez Jr. vs. Martinez" you can watch it in its entirety by clicking here. It's a great way to explore the history of these two rivals and how their contest finally came to be, while transcending the standard "Boxer A hates Boxer B" preview.

Has "The Legend Goes On" been riding his father's name to fame and fortune? Or is he going to prove he's the real deal at the expense of the aging "Maravilla?"

We'll find out in two days.

Special thanks to AT&T for sponsoring this post as part of its Julio Cesar Chavez Jr. vs. Sergio Martinez fight coverage.