Novak Djokovic of Serbia reacts after winning a semifinal match against Roger Federer of Switzerland at the U.S. Open tennis tournament in New York, Saturday, Sept. 10, 2011. (AP Photo/Mike Groll)

Associated Press
Novak Djokovic of Serbia reacts after winning a semifinal match against Roger Federer of Switzerland at the U.S. Open tennis tournament in New York, Saturday, Sept. 10, 2011. (AP Photo/Mike Groll)
Novak Djokovic of Serbia reacts after winning a semifinal match against Roger Federer of Switzerland at the U.S. Open tennis tournament in New York, Saturday, Sept. 10, 2011. (AP Photo/Mike Groll)
View Comments (0)