Entertainment Sports Caroline Wozniacki Attends Fellow Tennis Star and 'Bestie' Serena Williams' Fashion Week Show "My sister. I love you!!!!" Serena Williams commented on her fellow tennis star's Instagram By Lindsay Kimble Lindsay Kimble Lindsay Kimble is a Senior Digital News Editor and the Sports Editor for PEOPLE Digital. She's worked at PEOPLE for over seven years as a writer, reporter and editor across our Entertainment, Lifestyle and News teams, covering everything from the Super Bowl to the Met Gala. She's been nominated for the ASME NEXT Awards for Journalists Under 30, and previously wrote for Us Weekly while on staff at Wenner Media. People Editorial Guidelines Published on September 12, 2019 12:17 PM Share Tweet Pin Email From the court to the runway, Serena Williams and Caroline Wozniacki’s friendship knows no limits. Wozniacki attended the New York Fashion Week show for Williams’ S by Serena, her direct-to-consumer fashion line, which launched last year. The collection includes loungewear, basics, and work-appropriate items. “Proud of my bestie @serenawilliams for the launch of her new collection at the @nyfw,” wrote Wozniacki, 29, on Instagram alongside a photo of herself and her fellow tennis star, 37. Serena Williams Hits the NYFW Runway with Daughter Olympia, 2, for Her Fashion Line Show Commented Williams, “My sister. I love you!!!!” Wozniacki also shared a photo of the pals posing with their husbands, David Lee and Alexis Ohanian, respectively. And on a picture Wozniacki posted of herself looking glam for the presentation, Williams wrote in the comments, “Are you kidding me?? This is such a look!!!!!!!! Wow.” Williams served as bridesmaid in Wozniacki’s Tuscany wedding to former NBA star Lee in June. Serena Williams and Alexis Ohanian Step Out for Date Night After Her U.S. Open Loss “I was so happy to see such two amazing people united with love. Here’s to a lifetime together,” Williams wrote on Instagram of Wozniacki, a fellow former world No. 1 player in women’s tennis singles, and Lee. The New York Fashion Week show came just days after Williams’ U.S. Open final loss to 19-year-old Canadian Bianca Andreescu, which she later called her “worst match.” The veteran tennis star lost 6-3, 7-5.