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Model Bar Refaeli Prepares to Serve at the Nike Tennis Primetime Knockout Event



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    NEW YORK - AUGUST 25: Model Bar Refaeli attends the Nike Tennis Primetime Knockout event at Pier 54 on August 25, 2010 in New York City. (Photo by Bryan Bedder/Getty Images)

    Refaeli was joined by actor Bradley Cooper, New York Giants defensive lineman Justin Tuck and tennis superstars Rafael Nadal, Roger Federer and Serena Williams to help kick off the 2010 U.S. Open.