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Britain's Martin Murray (25-0-1, 11 KOs), 30, will face middleweight champion Sergio "Maravilla" Martinez on Saturday at Club Atletico Velez Sarsfield stadium in Buenos Aires, Argentina.
Murray (25-0-1, 11 KOs), a clear underdog, will be facing a hostile environment in a place where it seems very hard to picture him as the winner. However, the British fighter has what it takes for an upset. He's younger, likes to get into a brawl and has nothing to lose against the heavy favorite Martinez (50-2-2, 28 KOs) in his homecoming fight.
Here are five keys to victory for Murray against Martinez: