Del Potro upsets Federer to win US Open

Juan Martin del Potro, of Argentina, kisses the championship trophy after winning the men's finals championship over Roger Federer, of Switzerland, at the U.S. Open tennis tournament in New York, Monday, Sept. 14, 2009.(AP Photo/Charles Krupa)

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Injured Roddick ... American Andy Roddick answers questions of journalists during a press conference of Shanghai ATP Masters 1000 tennis tournament at Qizhong Stadium Tuesday, Oct. 13, 2009 in Shanghai, China. Roddick retired in the first set of his second-round match of Shanghai Masters against Swiss Stanislas Wawrinka of Switzerland on Tuesday. (AP Photo/Eugene Hoshiko)
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No. 9 Zvonareva ... Vera Zvonareva of Russia reacts during her singles match to Caroline Wozniacki of Denmark at the WTA Tennis Championships, in Doha, Qatar Thursday, Oct. 29, 2009. (AP Photo/Kirsty Wigglesworth)
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Del Potro upsets... Juan Martin del Potro, of Argentina, kisses the championship trophy after winning the men's finals championship over Roger Federer, of Switzerland, at the U.S. Open tennis tournament in New York, Monday, Sept. 14, 2009.(AP Photo/Charles Krupa)