400 Metres Summary | 15th IAAF World Championships

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

POS	Rank	Heat	BIB	ATHLETE	COUNTRY	RESULTS
1	1	2	243	Isaac Makwala	BOT	44.11 Q
2	1	1	580	Kirani James	GRN	44.16 Q
3	2	1	410	Luguelín Santos	DOM	44.26 Q NR
4	1	3	857	Wayde van Niekerk	RSA	44.31 Q
5	2	3	1047	LaShawn Merritt	USA	44.34 Q SB
6	2	2	715	Yousef Ahmed Masrahi	KSA	44.40 Q
7	3	2	520	Rabah Yousif	GBR	44.54 q PB
8	3	3	938	Machel Cedenio	TTO	44.64 q
9	4	2	940	Lalonde Gordon	TTO	44.70
10	3	1	1067	David Verburg	USA	44.71
11	4	1	216	Kevin Borlée	BEL	44.74 SB
12	5	2	1049	Bryshon Nellum	USA	44.77
12	4	3	627	Javon Francis	JAM	44.77
14	5	3	217	Jonathan Borlée	BEL	44.85
15	6	2	631	Rusheen McDonald	JAM	44.86
16	7	2	194	Steven Gardiner	BAH	44.98
16	5	1	943	Renny Quow	TTO	44.98
18	6	1	1050	Vernon Norwood	USA	45.07
18	7	1	189	Chris Brown	BAH	45.07
20	6	3	521	Martyn Rooney	GBR	45.29
21	8	2	362	Nery Brenes	CRC	45.41
22	8	1	632	Peter Matthews	JAM	45.42
23	7	3	204	Michael Mathieu	BAH	45.43
24	8	3	759	Liemarvin Bonevacia	NED	45.65

400 Metres men