NEW YORK - SEPTEMBER 04: Jelena Jankovic of Serbia returns a ball during match against Kaia Kanepi of Estonia at US Open Tennis Championship on September 04, 2010 in New York, City.
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NEW YORK - SEPTEMBER 04: Jelena Jankovic of Serbia returns a ball during match against Kaia Kanepi of Estonia at US Open Tennis Championship on September 04, 2010 in New York, City.