5 keys for Sergio Martinez

The middleweight title bout between Julio Cesar Chavez Jr. and Sergio Martinez on Saturday from Las Vegas will feature two fighters from completely different backgrounds fighting for much more than Latin-American bragging rights.

Chavez (46-0-1, 32 KO) and Martinez (49-2-2, 28 KO) will wage a war that could end up defining the new generation of middleweights, with their two contrasting styles encompassing almost the entire spectrum of different styles at 160 pounds.

In what probably will be the ultimate crossroads fight, the young and plodding Chavez will seek to impose his heavier hands and sturdier chin against an older and faster Martinez, who likely will try to play matador against Chavez's bullish act. The stage is set for a grudge match between two guys who have made their mutual dislike the centerpiece of this promotion. They also are among the hungriest fighters today in their search for popularity, respect from media and fans, and the ultimate prize that comes from sitting atop one of boxing's elite divisions.

Here we discuss five keys that could take Martinez to victory on Saturday:

A lifetime in the making

The fine art of handling fights

Now you see me ... now you don't

Experience and good judgment

Three warriors and something else ...

Carlos Irusta is a contributor to ESPNdeportes.com.