Serena, Venus Williams lose in first round of US O…


Serena Williams, right, and Venus Williams celebrate during their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships.

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Frank Franklin II/AP


Serena Williams, right, and Venus Williams celebrate during their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships.

Frank Franklin II/AP

NEW YORK — Serena and Venus Williams traded fist bumps or palm slaps and chatted between points. They smiled while conversing in their seats at changeovers.

When their first doubles match together in 4 1/2 years ended with a loss at the U.S Open on Thursday night, the siblings hugged each other, then left the court to a standing ovation.

The Williams sisters were eliminated by the Czech pair of Lucie Hradecka and Linda Noskova 7-6 (5), 6-4 at Flushing Meadows.

“I was speechless when I found out I’m going to face these two. I mean, they’re legends. And I was always such a big fan of them, especially Serena. She has been my idol since ever, probably,” said Noskova, a 17-year-old making her Grand Slam debut in doubles. “So I was really happy, excited, but kind of scared, to face them.”

Arthur Ashe Stadium had never hosted a first-round doubles match — for women or men, during the night or day — until this one…