400 Metres Summary | IAAF World Championships London 2017

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

POS	Rank	Heat	BIB	ATHLETE	COUNTRY	RESULTS	ms*
1	1	1	667	Steven GARDINER	BAH	43.89 Q NR
2	2	1	1071	Nathon ALLEN	JAM	44.19 Q PB
3	1	2	1282	Wayde VAN NIEKERK	RSA	44.22 Q
4	1	3	708	Isaac MAKWALA	BOT	44.30 Q
5	2	2	712	Baboloki THEBE	BOT	44.33 Q
6	3	1	1413	Fred KERLEY	USA	44.51 q
7	2	3	1084	Demish GAYE	JAM	44.55 Q PB
8	3	2	1266	Abdalelah Haroun	QAT	44.64 q SB
9	4	2	961	Matthew HUDSON-SMITH	GBR	44.74 SB
10	3	3	1431	Gil Roberts	USA	44.84
11	4	1	688	Kévin BORLÉE	BEL	45.10
12	5	1	1422	Wilbert LONDON	USA	45.12
13	4	3	766	Jamal Walton	CAY	45.16	.157
14	6	1	871	Óscar HUSILLOS	ESP	45.16 PB	.160
15	5	2	1325	Lalonde Gordon	TTO	45.20
16	5	3	689	Jonathan BORLÉE	BEL	45.23
17	6	3	833	Pavel MASLÁK	CZE	45.24
18	7	1	1249	Rafał Omelko	POL	45.37
19	6	2	1055	Brian GREGAN	IRL	45.42
20	7	2	1426	LaShawn Merritt	USA	45.52
21	7	3	1324	Machel CEDENIO	TTO	45.91
22	8	2	1143	Boniface Ontuga MWERESA	KEN	45.93
23	8	3	1065	Davide RE	ITA	45.95
24	8	1	952	Dwayne COWAN	GBR	45.96