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Insanity exercise guru Shaun T gives Novak Djokovic
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Insanity exercise guru Shaun T gives Novak Djokovic some pointers about fitness during his match against the kids in Arthur Ashe Stadium during Kids Day at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 23, 2014.(Credit: Newsday / J. Conrad Williams Jr.)

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Kids Day at Arthur Ashe Stadium

Before the U.S. Open tournament got underway, kids flooded the Billie Jean King National Tennis Center in Flushing for Kids Day.