These are the official results of the Men's 400 metres event at the 1999 IAAF World Championships in Seville, Spain. There were a total number of 48 participating athletes, with six qualifying heats, four quarter-finals, two semi-finals and the final held on Thursday 26 August 1999 at 8.45 pm. The winning margin was 1.11 seconds which as of May 2025 remains the greatest winning margin in the history of the men's 400 metres at these championships and the only time this race has been won by over one second. It was also a greater winning margin than the men's 5,000 metres in 1999.
Final RANKFINALTIME43.18 44.2944.314.44.655.45.076.45.18DQDQ
Semi-final Held on Tuesday 24 August 1999 RANKHEAT 1TIME1.43.952.44.373.44.374.44.475.44.516.44.62 (NR)7.45.578.45.86
RANKHEAT 2TIME1.45.092.45.243.45.474.45.665.45.67DQDQDNF
Quarter-finals Held on Monday 23 August 1999 RANKHEAT 1TIME1.45.143.45.544.45.615.45.716.45.877.46.408.46.42DQ
RANKHEAT 2TIME1.45.102.45.273.45.534.45.545.45.696.46.217.46.408.46.57
RANKHEAT 3TIME1.44.972.44.983.45.134.45.235.45.776.45.78DQDNS
RANKHEAT 4TIME1.44.722.45.133.45.144.45.435.45.506.46.047.46.368.46.37
Heats Held on Saturday 21 August 1999 RANKHEAT 1TIME1.45.132.45.253.45.264.45.475.45.956.46.427.46.448.46.80
RANKHEAT 2TIME1.45.342.45.353.45.634.45.905.46.136.46.617.46.728.46.87
RANKHEAT 3TIME1.45.132.45.733.45.944.46.255.46.336.46.537.48.10DQ
RANKHEAT 4TIME1.45.152.45.363.45.514.45.565.45.586.45.617.46.20DNS
RANKHEAT 5TIME1.45.512.45.763.46.124.46.605.46.976.47.42DQDQ
RANKHEAT 6TIME1.45.722.45.873.45.944.45.985.46.136.46.437.47.498.48.32
References The 7th IAAF World Championships in athletics 1999. Result. iaaf.org