2004 World Junior Championships in Athletics – Men's 400 metres explained

The men's 400 metres event at the 2004 World Junior Championships in Athletics was held in Grosseto, Italy, at Stadio Olimpico Carlo Zecchini on 13, 14 and 15 July.

Medalists

Gold	LaShawn Merritt
Silver	Nagmeldin Ali Abubaker
Bronze	Obakeng Ngwigwa

Results

Final

15 July

Rank	Name	Nationality	Time	Notes
	align=left		align=left		45.25
	align=left		align=left		45.97
	align=left		align=left		45.97
4	align=left		align=left		46.40
5	align=left		align=left		46.63
6	align=left		align=left		46.84
7	align=left		align=left		46.88
8	align=left		align=left		46.95

Semifinals

14 July

Semifinal 1

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		45.84	Q
2	align=left		align=left		45.99	Q
3	align=left		align=left		47.42
4	align=left		align=left		47.49
5	align=left		align=left		47.65
6	align=left		align=left		47.86
7	align=left		align=left		49.26
	align=left		align=left		DQ	IAAF rule 163.3

Semifinal 2

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.64	Q
2	align=left		align=left		46.80	Q
3	align=left		align=left		46.93	q
4	align=left		align=left		47.18
5	align=left		align=left		47.40
6	align=left		align=left		47.62
7	align=left		align=left		48.19
8	align=left		align=left		48.27

Semifinal 3

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.46	Q
2	align=left		align=left		46.94	Q
3	align=left		align=left		47.02	q
4	align=left		align=left		47.08
5	align=left		align=left		47.37
6	align=left		align=left		47.79
7	align=left		align=left		48.25
	align=left		align=left		DNF

Heats

13 July

Heat 1

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.54	Q
2	align=left		align=left		47.02	Q
3	align=left		align=left		47.19	Q
4	align=left		align=left		47.25	q
5	align=left		align=left		47.58
6	align=left		align=left		48.41
7	align=left		align=left		49.22
8	align=left		align=left		50.43

Heat 2

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.68	Q
2	align=left		align=left		47.31	Q
3	align=left		align=left		47.54	Q
4	align=left		align=left		47.68
5	align=left		align=left		47.73
6	align=left		align=left		54.53

Heat 3

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.47	Q
2	align=left		align=left		47.88	Q
3	align=left		align=left		48.09	Q
4	align=left		align=left		48.70
5	align=left		align=left		48.73
6	align=left		align=left		49.38
7	align=left		align=left		49.66

Heat 4

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.70	Q
2	align=left		align=left		47.17	Q
3	align=left		align=left		47.43	Q
4	align=left		align=left		47.43	q
5	align=left		align=left		48.14
6	align=left		align=left		48.67
7	align=left		align=left		58.29

Heat 5

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.14	Q
2	align=left		align=left		47.16	Q
3	align=left		align=left		47.48	Q
4	align=left		align=left		47.93
5	align=left		align=left		48.09
	align=left		align=left		DQ	IAAF rule 163.3

Heat 6

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.48	Q
2	align=left		align=left		47.00	Q
3	align=left		align=left		47.06	Q
4	align=left		align=left		47.35	q
5	align=left		align=left		47.74
6	align=left		align=left		48.07
7	align=left		align=left		48.95

Heat 7

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.92	Q
2	align=left		align=left		47.68	Q
3	align=left		align=left		47.83	Q
4	align=left		align=left		48.06
5	align=left		align=left		48.66
6	align=left		align=left		51.72

Participation

According to an unofficial count, 47 athletes from 39 countries participated in the event.