Olympic sprinter Michael Johnson sufferers ministroke
400 metres - Wikipedia
Olympic champ Wayde van Niekerk back running, hopes to defend title in Tokyo | CBC Sports
Cathy FREEMAN - 400m silver medal at Atlanta Olympic Games. - Australia
Olympic Track and Field 2016: Men's 400M Medal Winners, Times and Results | Bleacher Report | Latest News, Videos and Highlights
Reigning 400m Olympic champion Van Niekerk tests positive for coronavirus- The New Indian Express
Men's 400m Final | IAAF World Championships London 2017 - YouTube
Wayde van Niekerk wants to become the first man to break 43 seconds in 400m | Watch Athletics
Steve LEWIS - 1988 Olympic Games 400m Champion. - U.S.A.
Shaunae Miller is the women's 400m Olympic Champion - YouTube
Report: men's 400m final – Rio 2016 Olympic Games| News
Reigning 400m Olympic champion Van Niekerk tests positive for coronavirus- The New Indian Express
2012 Olympic champion among new quartet facing doping charges · The42
Report: men's 400m final – Rio 2016 Olympic Games| News
South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
Olympic champion Wayde van Niekerk tests positive for coronavirus | The Independent | The Independent
Report: women's 400m semi-finals – Rio 2016 Olympic Games| News
Olympic champion Dalilah Muhammad sets 400 metres hurdles world record, Lyles wins 200 metres, Sports News | wionews.com
Two Olympic champions amongst four Russians accused of doping - Sportstar
