Weekend Sports In Brief (The Associated Press)

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No. 1 Novak Djokovic is into his 26th straight major quarterfinal after a hard-fought victory over Roberto Bautista Agut at the U.S. Open. Bautista Agut, who has never reached a Grand Slam quarterfinal, was down a break in the second set. NEW YORK - Serena Williams is three wins away from completing the first Grand Slam since 1988 after a crisp straight-set victory over young American Madison Keys.

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