World Championships: Leon Marchand Scares World Record in 400 IM
Alison dos Santos upset Karsten Warholm in the 400-meter hurdles. - The New York Times
Memorable records highlight NCAA indoor track and field championships
Wayde van Niekerk wins gold, sets world record in 400m - Sports Illustrated
Has any Olympic runner ever medaled in the 100m/200m/and 400 m? - Quora
Athletics: Top 10 Men's 400m hurdles, Karsten Warholm history
We've All Been Waiting For This... || The 400 Meter World Record - YouTube
The 400 Meter WORLD RECORD || WAYDE VAN NIEKERK'S Plan for 2021 - YouTube
2019 World Athletics Championships – Men's 400 metres - Wikipedia
Men's 400m world record holder Van Niekerk tests positive for coronavirus
/cdn.vox-cdn.com/uploads/chorus_image/image/50388485/Screen_Shot_2016-08-14_at_9.02.30_PM.0.0.png "Olympics 2016 results: Wayde van Niekerk sets world record from lane 8 in men's 400m run - SBNation.com")
Olympics 2016 results: Wayde van Niekerk sets world record from lane 8 in men's 400m run - SBNation.com
WAYDE VAN NIEKERK || MAKING A WORLD RECORD - MEN'S 400 METERS - YouTube
Tokyo Olympics: New world record in men's 400-meter hurdles | cbs8.com
Breaking world record was just a stepping stone: Olympic champion Wayde van Niekerk
The men's 400 world record moves rarely, but it does move dramatically
Sydney McLaughlin Beat Dalilah Muhammad, Set a New World Record and Won Gold - The New York Times
400 metres at the Olympics - Wikipedia
Men's 400 Meters Is Shaping Up As the Most Exciting Race
Wayde van Niekerk breaks World record on 400m | 2016 Rio Oly… | Flickr
Karsten Warholm: Norwegian breaks men's 400m hurdles world record | CNN
World record 400 m men 1999 | Sportguide - guides you through the world of sports
Brilliant Van Niekerk smashes 400m world record | Reuters
Olympics: Karsten Warholm breaks 400m hurdles world record
Brilliant Van Niekerk smashes 400m world record | Reuters.com
Wayde van Niekerk breaks 400m world record to win gold - YouTube
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
