Tennis legend Serena Williams has shared an adorable photo of her and Alexis Ohanian's daughter Olympia dressed up as Elsa from Frozen. The cute tot is seen riding a scooter while an animation of her favorite doll Qai Qai scoots behind her. “Elsa has Olaf, @olympiaohanian has @realqaiqai,” Serena captioned the snap with a happy face and heart emoji.