Australia’s Ariarne Titmus ran down Katie Ledecky in the 400-meter freestyle, handing Ledecky her first-ever Olympic silver in an individual event. #NBCOlympics #Tokyo2020 #Swimming » Subscribe to NBC Sports: » Watch live Olympic coverage on NBCOlympics.com: Stay up to date on Swimming in Tokyo: Visit NBCOlympics.com,: Watch the Tokyo Olympics on Peacock: Download the NBC… Continue reading Ariarne Titmus dethrones Katie Ledecky for women's 400m freestyle gold | Tokyo Olympics | NBC Sports