Rafael Nadal of Spain reacts during his match against Gilles Muller of Luxembourg during the U.S. Open tennis tournament in New York, Wednesday, Sept. 7, 2011. (AP Photo/Mike Groll)

Associated Press
Rafael Nadal of Spain reacts during his match against Gilles Muller of Luxembourg during the U.S. Open tennis tournament in New York, Wednesday, Sept. 7, 2011. (AP Photo/Mike Groll)
Rafael Nadal of Spain reacts during his match against Gilles Muller of Luxembourg during the U.S. Open tennis tournament in New York, Wednesday, Sept. 7, 2011. (AP Photo/Mike Groll)
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