Leon Marchand goes golden again in men's 400m medley at World Aquatics Championships | NBC Sports

France's Leon Marchand followed up his gold-medal performance in the men's 200m individual medley with another gold in the men's 400m individual medley at the 2025 World Aquatics Championships in Singapore. #NBCSports #LeonMarchand #Swimming » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Watch Live Sports on Peacock: https://peacocktv.smart.link/v82e9dl56 NBC Sports Group serves spo...