The favourite Manny Pacquiao of the Philippines claimed the IBO light-welterweight title with a second round knockout of the English boxer Ricky Hatton in Las Vegas.
The 30-year-old southpaw twice knocked the Englishman to the canvas in the opening round before ending the fight with a stinging left hook after two minutes, 59 seconds of the second.
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Widely regarded as the best pound-for-pound fighter in the world, Pacquiao improved his career record to 49-3-2 with 37 knockouts.
Hatton, who had never previously lost at his natural weight , slipped to 45-2 with 32 knockouts.