NEW YORK - SEPTEMBER 07: Nenad Zimonjic of Serbia (L) and Daniel Nestor of Canada return a shot during their doubles match against Robert Kendrick of the United States and Janko Tipsarevic of Serbia during day eight of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on September 7, 2009 in the Flushing neighborhood of the Queens borough of New York City.