Caroline Wozniacki is about to become a mom of three! The former world No.1 and Grand Slam champion shared the exciting news on Instagram, posting a beach photo of her family. In the image, daughter Olivia holds up an ultrasound, revealing that a new sibling is on the way.

“Officially switching to zone defense!” Wozniacki captioned the post, joking that she and her husband, retired NBA player David Lee, will soon be outnumbered by their kids. “Our family couldn’t be more excited to welcome baby #3 soon!