400 Metres Result | IAAF World Championships London 2017

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

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	667	Steven Gardiner	BAH	43.89 Q NR	0.186
2	1071	Nathon Allen	JAM	44.19 Q PB	0.161
3	1413	Fred Kerley	USA	44.51 q	0.137
4	688	Kevin Borlée	BEL	45.10	0.146
5	1422	Wilbert London	USA	45.12	0.181
6	871	Óscar Husillos	ESP	45.16 PB	0.163
7	1249	Rafał Omelko	POL	45.37	0.201
8	952	Dwayne Cowan	GBR	45.96	0.144

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	1282	Wayde van Niekerk	RSA	44.22 Q	0.168
2	712	Baboloki Thebe	BOT	44.33 Q	0.178
3	1266	Abdalelah Haroun	QAT	44.64 q SB	0.179
4	961	Matthew Hudson-Smith	GBR	44.74 SB	0.142
5	1325	Lalonde Gordon	TTO	45.20	0.151
6	1055	Brian Gregan	IRL	45.42	0.188
7	1426	LaShawn Merritt	USA	45.52	0.195
8	1143	Boniface Ontuga Mweresa	KEN	45.93	0.234

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	708	Isaac Makwala	BOT	44.30 Q	0.248
2	1084	Demish Gaye	JAM	44.55 Q PB	0.157
3	1431	Gil Roberts	USA	44.84	0.170
4	766	Jamal Walton	CAY	45.16	0.153
5	689	Jonathan Borlée	BEL	45.23	0.203
6	833	Pavel Maslák	CZE	45.24	0.146
7	1324	Machel Cedenio	TTO	45.91	0.221
8	1065	Davide Re	ITA	45.95	0.186