Serbia's player Novak Djokovic reacts during his match against Sam Querrey of the U.S. at the Paris Tennis Masters tournament, Wednesday, Oct. 31, 2012. Sam Querrey defeated Novak Djokovic. (AP Photo/Remy de la Mauviniere)
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Serbia's player Novak Djokovic reacts during his match against Sam Querrey of the U.S. at the Paris Tennis Masters tournament, Wednesday, Oct. 31, 2012. Sam Querrey defeated Novak Djokovic. (AP Photo/Remy de la Mauviniere)
