Sydney McLaughlin breaks her own world record to win her latest duel with Dalilah Muhammad, this time to win Olympic gold in the 400m hurdles in Tokyo. #NBCOlympics #Tokyo2020 #SydneyMcLaughlin #DalilahMuhammad » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Watch live Olympic coverage on NBCOlympics.com: https://www.nbcolympics.com/schedule Visit NBCOlympics.com,: https://www.nbcolympics.com Watch the Tokyo Olympics on Peacock: https://pck.tv/3eA5RJk Download the NBC Olympics App: https://apps.apple.com/us/app/nbc-sports/id542511686 Find NBC Olympics on Facebook: https://www.facebook.com/nbcolympics Follow NBC Olympics on Twitter: https://twitter.com/NBCOlympics Follow NBC Olympics on Instagram: https://www.instagram.com/nbcolympics McLaughlin SMASHES world record, edges Muhammad for 400m hurdles gold | Tokyo Olympics | NBC Sports https://www.youtube.com/nbcsports