Celebrities hit the US Open courts
Tennis fans around the world are tuning in to the U.S. Open, which kicked off in Flushing, Queens, on Sunday. But entertainment fans, take note -- keep your eyes on the stands, and you might be able to catch a glimpse of some very famous faces.
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Anna Wintour, whose Vogue office is based in NYC, was among the first to catch a match. The fashion icon is known for her friendship with Roger Federer and recently featured Novak Djokovic in her coveted September issue.
Other celeb sightings included Amanda Seyfried, Alec Baldwin and even One Direction Niall Horan, who sat next to Jamie Foxx in an elite box seat.
See who else took to the stands in the slideshow above.
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