The dress in question is called the NikeCourt Premier Slam Dress and, as Jezebel puts it, resembles "nothing so much as an athletic nightgown, and it does not stay down or keep athletes covered when they’re trying to play tennis."
Lucie Safarova of the Czech Republic wears the NikeCourt Premier Slam Dress during the Ladies Singles first round match on day one of the Wimbledon Lawn Tennis Championships on June 27th, 2016 in England.
According to the Daily Mail, Nike sent out a "VERY important" email to Wimbledon players and their representatives saying, "We need to make a small change to your dresses per Wimbledon rules. Could you please bring them by the Nike Wimbledon House?"
However, Nike disputes the recall, saying in a statement, "The product has not been recalled and we often customize products and make alterations for athletes as they compete. We work closely with our athletes to provide them with product that helps them perform and feel their best on the court."
Still, the dress is proving to be problematic for the players competing at Wimbledon, with a few making their own alterations to make the dress more performance-friendly. According to the New York Times, British tennis player Katie Boulter improvised by tying a headband around her waist as a belt to hold the fabric in place, while the Czech Republic's Lucie Hradecka wore leggings underneath, treating the dress as a shirt.
Rebecca Peterson of Sweden, alternatively, played with a long sleeve shirt overtop the dress to hold it in place.
"When I was serving, it was coming up, and I felt like the dress was just everywhere," Peterson told the Times. "In general, it’s quite simple, the dress, but it was flying everywhere."
But one person who seems to have no issues with the dress is Canadian tennis player, Eugenie Bouchard, who has appeared in promotional ads for the Nike dress.
"For me, I love it,” Bouchard told TSN, according to the Times. "It’s nice and short so you can move around and be free with your movements. Yeah, I don’t know. It’s funny that people paid a lot of attention to it, but I really think it’s really nice."
Of all the Nike-sponsored athletes, the only one who isn't affected by the dress is Serena Williams, as Nike provides unique outfits for her. Her Wimbledon ensemble is a more, well, wearable, take on the offending piece.