Last update on. From the section OlympicsTokyo Olympic Games on BBC Dates: 23 Jul-8 Aug Time in Tokyo: BST+8. Listen live on BBC TV, BBC iPlayer and BBC Red Button; Listen live on BBC Radio 5 Live, Sports Extra, and Sounds; Live text and video clips available on BBC Sport app and website.Norway's Karsten Warsholm won the men's 400m hurdles race in a spectacular effort to surpass his old world record and win gold at Tokyo 2020.Warholm, 25 years old, finished in 45.94 seconds, slashing more than seven tenths of his old record. American Rai Benjamin, who had also broken the previous record, was on his heels for silver.Warholm had previously set the world record at 46.70 in Oslo, July.Brazil's Alison dos Santos won the bronze medal in 46.72 seconds."You're familiar with the old cliche that it hasn’t yet sunk in? "I don't believe it has, but I feel ecstatic," Warholm said to BBC Sport. Warholm now holds the European and Olympic titles."I cannot believe how fast it goes! A lot of times I get asked about the perfect race. Although I denied that it existed, I can tell you this: This is the closest I have ever been to it."I said to myself, "Go into the race, remember the hard work you've put in. It was the only thing that was missing from my [medal] collections.This is so important to me. It's what I do every day, from morning to night. It's enormous.Warholm had already broken this world record in JulyAfter Benjamin's win in the US trials, Benjamin was within five hundredths second of setting the world record for the fastest race at the Games.Warholm led the race out of the blocks, but Benjamin tried to retake him before Benjamin's last push for the line.He laughed with joy when he saw his time on the screen. In celebration, he ripped off his shirt and took photographs beside the new world record.Colin Jackson, a two-time world 110m hurdles champion, told BBC TV that he was proud to be a world record holder. He said: "When we talk about world records this is up there alongside Usain Bolt’s 9.58 second time in the 100m and Flo Jo’s 10.49 second in the 100m."This is one the most remarkable world records, and I'm sure that it will outlive my life."It's simply breathtaking. Wow. Wow.Steve Cram, an Olympic 1500m silver medallist, said: "No wonder that he tears his shirt apart – he is Superman at this event!"I can't believe what I just saw." Two men running times that you can only imagine.