Norway's Karsten Warholm has won 400m hurdles gold after shattering his own world record at Tokyo 2020. USA's Rai Benjamin, who was closest to the 25-year-old all the way, finished in a time of 46.17 seconds to take silver. And Warholm says the second-placed Benjamin deserved a gold such was the brilliance of his performance. You want it? We have it. Stream every Olympic event live on discovery+.