400 Metres Summary | 13th IAAF World Championships in Athletics

First 2 in each heat (Q) and the next 2 fastest (q)

POS	Rank	Heat	BIB	ATHLETE	COUNTRY	RESULTS
1	1	1	1099	LaShawn Merritt	USA	44.76 Q
2	1	3	594	Jermaine Gonzales	JAM	44.99 Q
3	2	1	171	Kévin BORLÉE	BEL	45.02 Q
4	2	3	170	Jonathan BORLÉE	BEL	45.14 Q
5	3	3	524	Rondell Bartholomew	GRN	45.17 q
6	1	2	525	Kirani JAMES	GRN	45.20 Q
7	4	3	874	Femi OGUNODE	QAT	45.41 q SB
8	3	1	963	Rabah YOUSIF	SUD	45.43
9	5	3	1106	Greg Nixon	USA	45.51
10	2	2	565	Tabarie Henry	ISV	45.53 Q
11	3	2	154	Chris Brown	BAH	45.54
12	6	3	934	Pavel Trenikhin	RUS	45.68
13	4	1	1013	Renny QUOW	TTO	45.72
14	4	2	1131	Jamaal Torrance	USA	45.73
15	7	3	160	Demetrius Pinder	BAH	45.87
16	5	1	158	Ramon Miller	BAH	45.88
17	5	2	271	Nery Brenes	CRC	45.93
18	6	2	840	Marcin Marciniszyn	POL	45.94
19	7	2	456	Martyn ROONEY	GBR	46.09
20	6	1	618	Yuzo Kanemaru	JPN	46.11
21	7	1	278	Williams Collazo	CUB	46.13
22	8	3	896	Oscar Pistorius	RSA	46.19
23	8	1	303	Erison Hurtault	DMA	46.41
24	8	2	596	Riker Hylton	JAM	46.99

400 Metres men