Popsugar Health & Fitness Celebrity Fitness Who Is Naomi Osaka? 8 Things You Need to Know About the US Open Sensation Naomi Osaka 6 September 2018 by Tamara Pridgett View On One Page Photo 2 of 8 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 The 20-Year-Old Has a 120-mph Serve and a Powerful Forehand Previous Next Start Slideshow AthletesUS OpenTennis