03:34 - Source: CNN
Manny Pacquiao vs. Juan Manuel Marquez

For the fourth time in the past ten years, boxers Manny Pacquiao and Juan Manuel Marquez will face each other in the ring. The brawl goes down in history tomorrow night in Las Vegas.

While Pacquiao is a fighter by trade, there are many sides to the Filipino champion. “Early Start” anchor John Berman learned all about them when he spent time in the Pacquiao camp recently, talking to his trainers and the boxer himself.

“Manny Pacquiao has won titles in eight different weight classes,” Berman says. And though it won’t be the first time Pacquiao fights Marquez, round four is no less important. “All of have been close, all have been tough victories for Pacquiao.” It’s a rivalry practically unmatched in sports.

Pacquiao wants this fight to be a knockout. “I want this fourth fight to be the answer of all the doubts that is in his mind,” Pacquiao says. “His fans, they’re still claiming that they won the fights.”

Pacquiao’s fans don’t doubt him. The fighter dabbles in singing, acting and politics. “Pacquiao is a legend back home in the Philippines,” Berman says. “He was elected to Congress there in 2010.”

“I like politics to serve people,” Pacquiao says. “I know a lot of the people in the Philippines live in poverty, and I want to help them.”

CNN will air the fourth and final installment of HBO’s 24/7 Pacquaio-Marquez 4 at midnight on Friday.