Danish tennis ace Caroline Wozniacki captured some fun moments with best friend — fellow tennis star Serena William's daughter Olympia. Wozniacki posted a couple of pictures of Olympia playing with her sunglasses (one of the pictures, above) on Instagram yesterday. She captioned them, "Loved spending time with this little love bug today @olympiaohanian !! I think she liked my @ovvooptics sunglasses."