South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
Wayde van Niekerk: Five things to know about the Olympic 400m champion and world record holder
Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
We've All Been Waiting For This... || The 400 Meter World Record - YouTube
Karsten Warholm smashes 400m hurdles world record, wins gold in Tokyo - Canadian Running Magazine
400 metres - Wikipedia
Women's 400m World Record is 48.25 – Žiga P. Škraba
Wayde van Niekerk - Wikipedia
Norway's Warholm breaks 29-year-old 400m hurdles world record - CGTN
43.03 – The Fastest 400m in History – Žiga P. Škraba
Has any Olympic runner ever medaled in the 100m/200m/and 400 m? - Quora
Dutch runner Bol breaks 400m indoor world record
Sydney McLaughlin-Levrone eyes Marita Koch's 400-meter world record
Men's 400m world record holder Van Niekerk tests positive for coronavirus
How van Niekerk broke the 400m world record
Men's 400 Meters: South African Wayde van Niekerk Shatters World Record | Runner's World
The 400 Meter WORLD RECORD || WAYDE VAN NIEKERK'S Plan for 2021 - YouTube
The World's Fastest (Old) Man - The New York Times
Mohammad Anas smashes 400m national record to qualify for World Championships | More sports News - Times of India
Dutch runner Femke Bol breaks own 400m indoor world record
Track & Field Worlds 2022: Wayde van Niekerk, Kirani James and Michael Norman chasing 400m gold: Preview, schedule & how to watch
Tokyo Olympics Daily: Karsten Warholm wins greatest ever men's 400m hurdles
Record-holder Van Niekerk eases through 400m heat, U.S. trio advance | Reuters
