U.S. Open recap Day 8: An ambidextrous tennis prospect comes to New York

Follow The Athletic’s U.S. Open coverage Welcome to the U.S. Open briefing, where The Athletic will explain the stories behind the stories on each day of the tournament. On Day 8, a rare sight on the U.S. Open’s outside courts, a perfect record for a U.S. favorite and a champion’s unlikely superpowe

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