(CNN) -- Manny Pacquiao has told CNN even he was surprised at how quickly his fight against Great Britain's Ricky Hatton came to an end.



Manny Pacquiao throws a left hand on his way to a devastating victory over Ricky Hatton.



Pacquiao, often considered the best pound-for-pound boxer in the world, cemented his reputation Saturday night when he knocked out Hatton in the second round.



"That was two of the most exciting rounds I have seen in my career," said Chris Mannix, a writer for Sports Illustrated. "You saw, from the opening bell, Pacquiao was really dominant."



In an interview with CNN's Kristie LuStout after the fight, Pacquiao acknowledged the fight ended sooner than he expected.  Watch Pacquiao talk about his post-fight plans »



With the win at the MGM Grand Garden in Las Vegas, Nevada, Pacquiao added the light-welterweight crown to his past world titles: lightweight, super-featherweight, light-featherweight, featherweight and flyweight.



The Filipino's career record now stands at 49-3-2 with 37 knockouts.



The fight, for which Pacquiao reportedly earned $12 million, was brief. Pacquiao knocked Hatton down in the first round from a series of lightning-fast right hooks.



The British boxer managed to get to his feet and finish the round, but the outcome was evident once the second round began.



Hatton, the International Boxing Organization's light-welterweight champion, tried the classic brawling style that has fueled his career.



But Pacquiao's technique and speed quickly outclassed Hatton. The Filipino's right hooks set up a devastating left hook that flattened Hatton with a second remaining in the second round. The referee quickly ended the match.



"It turned out he (Hatton) just wasn't very good at boxing," Mannix said. "You saw the difference between a great fighter and very good fighter."



The 30-year-old Pacquiao is a national hero in the Philippines, where his bouts bring the country to a standstill. He came into the fight on Saturday as a narrow favorite after sending one of the biggest names in the sport, Oscar de la Hoya, into retirement with a stoppage victory in December.



Nicknamed "Pacman," he grew up poor in General Santos City in the southern Philippines. He found boxing as a way to lift himself to fame and riches, yet he remains self-deprecating outside of the ring.



It is this combination of a fierce fighter in the ring and a smiling deferential one outside that has helped turn him into an idol.



Outside a bar in the Wan Chai district of Hong Kong, China, a woman who would only identify herself as Amy and her friends erupted in joy. The second-biggest ethnic group behind Chinese are Filipinos



Amy and her friends -- all from the Philippines and working here in this world financial center -- were part of the crowd that had just witnessed the match live.  "This is great, this is wonderful," Amy screamed.



CNN's Kevin Drew contributed to this report
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