Sydney McLaughlin-Levrone eyes Marita Koch's 400-meter world record
Wayde van Niekerk Runs 43.03, Breaks 400m World Record! - FloTrack
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
Bol breaks long-standing world indoor 400m record | Reuters
400 METER WORLD RECORD || WHO WILL BREAK IT? - YouTube
Rio 2016: Wayde van Niekerk smashes Michael Johnson's 400m world record to clinch gold | Olympics 2016 | Sport | Express.co.uk
Wayde van Niekerk wins 400m heat to qualify for semi-finals at World Athletics Championships 2023
Report: women's 400m - IAAF World Athletics Championships Doha 2019 | REPORT | World Athletics
Femke Bol breaks 41-year world record in the women's indoor 400 meters | CNN
Femke Bol sets new indoor women's 400m world record with 49.26s - CGTN
Wayde van Niekerk: The race for my 400m world record
Men's 400m world record holder Van Niekerk tests positive for coronavirus
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
Van Niekerk betters 400m world record
McLaughlin breaks own 400 meters hurdles record with 'Track Town, USA' magic | Reuters
Wayde van Niekerk: Five things to know about the Olympic 400m champion and world record holder
Women's 400m World Record is 48.25 – Žiga P. Škraba
Two Americans Broke the World Record in the 400 Hurdles. Only One Could Win Gold. - WSJ
Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian
400 metres - Wikipedia
