Miami Tennis Cup | Sat., Dec. 1, 2012

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  Andy Roddick squares off against U.S. Open and Olympic U.S. Champion Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  U.S. Open and Olympic U.S. Champion Andy Murray serves Andy Roddick on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Miami Herald Staff

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  Andy Roddick squares off against U.S. Open and Olympic U.S. Champion Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  U.S. Open and Olympic U.S. Champion Andy Murray squares off against Andy Roddick on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  U.S. Open and Olympic U.S. Champion Andy Murray reacts as he losses a set against Andy Roddick on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  Fans turn out to see U.S. Open and Olympic U.S. Champion Andy Murray square off against Andy Roddick on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  U.S. Open and Olympic U.S. Champion Andy Roddick relaxes between sets during match against Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  Andy Roddick squares off against U.S. Open and Olympic U.S. Champion Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo

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  Andy Roddick squares off against U.S. Open and Olympic U.S. Champion Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center, Crandon Blvd, Key Biscayne, FL., on Saturday, December 1, 2012. Al Diaz / Staff Photo