Olympia Ohanian might only be 4 but she has an impressive backhand. The daughter of Serena Williams and Alexis Ohanian has an Instagram account run by her parents. On Monday they uploaded a short clip of the future tennis star practicing on the court with the caption, “Practice makes progress.“ Serena and her sister Venus Williams began playing tennis when they were 3 and 4, so Olympia is right on schedule to follow in their footsteps.