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FILE - In this Sept. 13, 2015, file photo, Novak Djokovic, of Serbia, holds up the championship trophy after defeating Roger Federer, of Switzerland, in the men's championship match of the U.S. Open tennis tournament,in New York. The first round of the U.S. Open tennis tournament is scheduled to being on Monday, Aug. 29, 2016. (AP Photo/Julio Cortez, File)

Roger Federer

Swiss tennis star