Novak Djokovic of Serbia celebrates winning his quarter final match against Jo-Wilfried Tsonga of France at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Djokovic won in five sets 6-1, 5-7, 5-7, 7-6, 6-1. (AP Photo/Christophe Ena)

Associated Press
Novak Djokovic of Serbia celebrates winning his quarter final match against Jo-Wilfried Tsonga of France at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Djokovic won in five sets 6-1, 5-7, 5-7, 7-6, 6-1. (AP Photo/Christophe Ena)
Novak Djokovic of Serbia celebrates winning his quarter final match against Jo-Wilfried Tsonga of France at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Djokovic won in five sets 6-1, 5-7, 5-7, 7-6, 6-1. (AP Photo/Christophe Ena)
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