By Salvador Rodriguez

As middleweight Marco Antonio Rubio (53-5-1, 46Kos) continues to train in the high altitude mountains in Torreon, he admits that WBC middleweight champion Julio Cesar Chavez Jr. (44-0-1, 31KOs) has grown as a fighter in the last two years. Rubio, one of the hardest punchers at middleweight, wants to test the chin of Chavez.

Rubio has no intention of reaching a decision. He wants to knock Chavez out, or get knocked out trying. Chavez's chin is certain to get tested because he gets hit a lot, says Rubio.

"I'm preparing to win the world title. That is my goal. I will bring everything to win. Julio has grown in the last three or four fights. He is a dangerous fighter, fast, strong, but no one has tested his jaw and I'm going to do that," Rubio said.

"I'll get the knockout. He's never touched the canvas. Let's see how good his jaw is. I'll knock him out or get knocked out. I really do not expect [this fight] to reach the judges. I have matured a lot. This time I feel no pressure. I have the advantage, which is my punch. I have 46 knockouts in 53 wins. I know his strengths and weaknesses, and among his faults is getting hit too much."

Salvador Rodriguez covers boxing in Mexico for The Record.