"My sister. I love you!!!!" Serena Williams commented on her fellow tennis star's Instagram

By Lindsay Kimble
September 12, 2019 12:17 PM

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.

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.

“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.