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. RELATED: 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. RELATED: 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…