Sam Querrey of the U.S. celebrates after defeating Novak Djokovic of Serbia at the Paris Tennis Masters tournament, Wednesday, Oct. 31, 2012. (AP Photo/Christophe Ena)

Associated Press
Sam Querrey of the U.S. celebrates after defeating Novak Djokovic of Serbia at the Paris Tennis Masters tournament, Wednesday, Oct. 31, 2012. (AP Photo/Christophe Ena)
Sam Querrey of the U.S. celebrates after defeating Novak Djokovic of Serbia at the Paris Tennis Masters tournament, Wednesday, Oct. 31, 2012. (AP Photo/Christophe Ena)
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