"Naomi Osaka is the first Asian tennis player to hold the number one singles ranking in the Women's Tennis Association. She started to make a name for herself at 16 and is now known around the world. Osaka has defeated the toughest players in the league and her talent continues to rise each year. Read more about this skilled tennis star!"-- Provided by publisher.

Number one -- Humble beginnings -- Turning pro -- Grand slam -- Finding her voice -- Timeline.