South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
Sydney McLaughlin Beat Dalilah Muhammad, Set a New World Record and Won Gold - The New York Times
Records Fell at the Track Worlds. A Trend? Not So Fast. - The New York Times
Women's 400m Final | World Athletics Championships - YouTube
/cloudfront-us-east-2.images.arcpublishing.com/reuters/OPZ7WLYXJZLZXB5J4QJ7QVWWL4.jpg "Record-holder Van Niekerk eases through 400m heat, U.S. trio advance | Reuters")
Record-holder Van Niekerk eases through 400m heat, U.S. trio advance | Reuters
Two Americans Broke the World Record in the 400 Hurdles. Only One Could Win Gold. - WSJ
Van Niekerk betters 400m world record
Wayde van Niekerk sets a 400-meter record that no one saw coming - The Washington Post
Karsten Warholm and Rai Benjamin Both Broke a Record, But Only One Won Gold - The New York Times
The men's 400 world record moves rarely, but it does move dramatically
Bol breaks long-standing world indoor 400m record | Reuters
Report: women's 400m - IAAF World Athletics Championships Doha 2019 | REPORT | World Athletics
Sydney McLaughlin-Levrone eyes Marita Koch's 400-meter world record
400 metres - Wikipedia
Men's 400m world record holder Van Niekerk tests positive for coronavirus
Rio Replay: Men's 400m Sprint Final - YouTube
Rio Olympics 2016: Wayde van Niekerk breaks world record to win Olympic gold - BBC Sport
How van Niekerk broke the 400m world record
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
Tokyo Olympics Daily: Karsten Warholm wins greatest ever men's 400m hurdles
