Julio Cesar Chavez Jr. takes on Sergio Martinez in a middleweight title fight that goes down this Saturday night (Sept. 15, 2012) live on pay-per-view (PPV) from the Thomas & Mack Center in Las Vegas, Nevada, in a rivalry that's been several years in the making.

Old school vs. new.

It's clear from this video just how much both fighters despise one another, which always adds another level of excitement to a marquee match-up, but the HBO 24/7 video series dedicated to this weekend's fisticuffs dives deeper into the backgrounds of both combatants.

Who they are and why they're here.

What's unfortunate is how a lot of fans became burned out on 24/7 after Manny Pacquiao and Floyd Mayweather Jr. dominated the boxing headlines in recent years. The good news is, both "Maravilla" and "The Legend Goes On" inject new life into the format and once again make it one of the top pre-event shows across any sport.

Have a look and see for yourself and get more background on Chavez Jr. vs. Martinez here and here.

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