At the final Grand Slam event of the season, we're dressing down the less-than-fabulous styles from Flushing. (Wherefore art thou, Roger Federer? Sigh.) The not-so-grand attire does the talking for us, mostly, so let's hop to it. (For sunnier styles, see the Fashion Aces list.)

We begin with—what else?—Nike's eyesores. New York, we have a problem:

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A hapless Eugenie Bouchard, Milos Raonic vanquisher Ryan Harrison and a good many more Nike-touting players wore the same kits. Your loyal Spin keeper is dripping with angst about this unsightly style: At what point do clothes become a hindrance or gamesmanship when they're the same color as the balls?

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Laura Siegemund flamed out against Venus Williams under the lights in Flushing but did draw much attention with her purple-and-black negligee theme. She would do well to cease with this style, a talking point among the tennis Twitterati.

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Denisa Allertova's dress arrived as a total bore. It's like a Venus design that someone forgot to fill in with a paint-by-numbers palette.

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Stan Wawrinka, schlepping for Yonex, delivers in a fresh fuschia shirt-and-shorts combo. It'd be a winner with a lighter (white?) shoe, but instead the black-on-black socks and shoes give off a serious dad vibe. And that's fine, he's a dad, but we expect more from a dad who doesn't slum it at your neighborhood tennis club.

Ana Ivanovic, Kristina Mladenovic and more wore Adidas' flashy, colorful frock that added up to less than its individual parts. Said a friend of the Spin about Ivanovic: "She looks like the world's most beautiful piñata."

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The Spin loved on Serena Williams' nighttime style, but her day-session look doesn't end up working, opera sleeves and all. "Her dress looks like a car wash," said one friend. "Is she a circus trapeze artist?" another asked.

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In closing, sadly, there's simply not a Lotto good news to share Belinda Bencic's seemingly unfinished kit.

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Check out the Fashion Aces for a welcome relief.

Your turn: Who turned in your own unforced fashion errors at this U.S. Open?