Summer showers put US Open semi-finals on hold – in pictures

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  Richard Reidel walks on a tarp-covered court at Arthur Ashe Stadium as he tests the sound system after the women's semi-final matches were postponed until Friday because of rain at the US Open. Kathy Willens / AP

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  Men walk on the tarp-covered court in Arthur Ashe Stadium after the women's semi-final matches were postponed on Thursday. Kathy Willens / AP

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  Rainwater puddles up the ledge of a port hole at Arthur Ashe Stadium, reflecting the not-yet completed retractable roof, after the women's semi-final matches were postponed because of rain on Thursday. Kathy Willens / AP

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  Sound technician Nick Scarmozzino tests the sound system in a tarp-covered Arthur Ashe Stadium after rain postponed play on Thursday. Kathy Willens / AP

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  Cutouts of professional tennis players Serena Williams, right, and Maria Sharapova, left, stand in a hotel lobby on Thursday in New York. David Goldman / AP

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  Arthur Ashe Stadium's not-yet-completed roof and a video screen test pattern are reflected in a puddle on the stadium's tarp-covered court after play was postponed by rain on Thursday. Kathy Willens / AP

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  Rain falls on a tarp-covered Arthur Ashe Stadium after the US Open women's semi-final matches were postponed on Thursday until Friday. Kathy Willens / AP

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  Two men look toward the not-yet-completed roof in Arthur Ashe Stadium after play was postponed by rain on Thursday at the US Open. Kathy Willens / AP

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  Spectators take cover during a rain delay on Wednesday at the US Open in one of the women's quarter-final matches. David Goldman / AP

Images from Flushing Meadows on Thursday as New York City rain washed out the semi-final matches between Serena Williams and Roberta Vinci, and Simona Halep and Flavia Pennetta. Click the arrows below to scroll through the photos.

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