400 Metres Summary | 13th IAAF World Championships in Athletics

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

Rank	Heat	BIB	ATHLETE	COUNTRY	RESULTS
3	1	768	Antonina Krivoshapka	RUS	50.55 q
	3	479	Joanne Cuddihy	IRL	DQ
3	3	920	Jessica Beard	USA	51.27
	2	910	Antonina Yefremova	UKR	DQ
6	1	407	Nicola Sanders	GBR	52.47
6	3	1002	Racheal Nachula	ZAM	53.30 SB
7	1	332	Maris Mägi	EST	53.27
1	1	935	Allyson Felix	USA	50.36 Q
	3	760	Anastasiya Kapachinskaya	RUS	DQ
5	2	166	Geisa Aparecida Coutinho	BRA	51.87
1	2	959	Francena McCorory	USA	50.24 Q PB
1	3	163	Amantle Montsho	BOT	50.13 Q
5	1	832	Moa Hjelmer	SWE	52.35
5	3	300	Denisa Rosolová	CZE	52.53
6	2	395	Lee McConnell	GBR	51.97
7	2	258	Norma González	COL	52.29
3	2	972	Sanya Richards-Ross	USA	50.66 q
2	3	529	Rosemarie Whyte	JAM	50.90
4	1	892	Nataliia Pygyda	UKR	51.61
2	2	531	Shericka Williams	JAM	50.46 Q SB
4	2	503	Marta Milani	ITA	51.86 PB
4	3	795	Ndeye Fatou Soumah	SEN	52.10
8	1	351	Fantu Magiso	ETH	53.41
2	1	532	Novlene Williams-Mills	JAM	50.48 Q

400 Metres women