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NEW YORK - SEPTEMBER 04: Marin Cilic of Croatia returns a shot against Jesse Levine during day five of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on September 4, 2009 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Jim McIsaac/Getty Images)

NEW YORK - SEPTEMBER 04:  Marin Cilic of Croatia returns a shot against Jesse Levine during day five of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on September 4, 2009 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Jim McIsaac/Getty Images)