Keidel: How Does Roger Federer Keep Winning?Roger Federer keeps defying physics and time. Is Tennis's greatest player defined by his wins or his ability to learn from losses?
6 Players With Most U.S. Open Singles Championships In Open EraIn the Open Era, there have been a number of tennis players to win two or more U.S. Open Singles Championships. Here's the 6 tennis players who have won the most Singles Championship titles in the Open Era:

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