American star Michael Johnson wins his fourth consecutive world title in the men's 400m with a new world record time of 43.18 seconds at the 1999 World Championships in Seville.

Clyde Hart, who coached Olympic 400m gold medalists Michael Johnson, Sanya Richards-Ross and Jeremy Wariner while spending 56 ...

American Michael Johnson, the 1996 Olympic gold medalist in the 200m and 400m, wins the men's 400m with a time of 44.12 seconds at the 1997 World Championships in Athens. This win marked Johnson's ...

— -- RIO DE JANEIRO -- Bursting out of the blocks in Lane 8, Wayde van Niekerk didn't see another runner during the entire Olympic 400-meter final. He didn't need to. It was just him against the ...