Serena Williams amazed by Wozniacki showing abs

Caroline Wozniacki and Serena Williams are best friends.

After 2 weeks after giving birth to her 2nd child, Caroline Wozniacki shared a post-pregnancy photo on Instagram.

fans are surprised after seeing Caroline Wozniacki's latest photos.

Even tennis icon Serena Williams is impressed by Caroline Wozniacki's post-pregnancy shape.

"Come on??? Wow," Serena commented on Instagram.

American player Nicole Gibbs commented: "U and the crop tops within a week of birth. Get out of here!!!"

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