2003 IAAF World Indoor Championships – Women's 400 metres

Heats

First 2 of each heat (Q) and next 2 fastest (q) qualified for the semifinals.

Rank	Heat	Name	Nationality	Time	Notes
1	3	Natalya Nazarova	Russia	51.24	Q
2	3	Catherine Murphy	Great Britain	51.89	Q, SB
3	1	Tonique Williams-Darling	Bahamas	52.04	Q, PB
4	5	Grit Breuer	Germany	52.10	Q
5	2	Christine Amertil	Bahamas	52.15	Q
6	4	Sviatlana Usovich	Belarus	52.20	Q
7	5	Sandie Richards	Jamaica	52.46	Q
8	1	Yuliya Pechenkina	Russia	52.62	Q
9	5	Grażyna Prokopek	Poland	52.72	q, NR
10	1	Jennifer Meadows	Great Britain	52.74	q, PB
11	2	Monique Hennagan	United States	52.83	Q
12	4	Aliann Pompey	Guyana	52.86	Q, SB
13	4	Kaltouma Nadjina	Chad	53.50
14	1	Sandrine Thiébaud-Kangni	Togo	53.51
15	1	Monika Niederstatter	Italy	53.57
16	2	Karen Shinkins	Ireland	53.59
17	4	Antonina Yefremova	Ukraine	53.64
18	2	Carmo Tavares	Portugal	53.65
19	3	Ronetta Smith	Jamaica	53.66	SB
20	5	Awatef Ben Hassine	Tunisia	54.01
21	5	Geisa Aparecida Coutinho	Brazil	54.23
22	1	Tiffany Barnes	United States	54.38
23	3	Maria Teresa Schutzmann	Italy	54.51
24	2	K.V.Damayanthi Dharsha	Sri Lanka	54.61
25	5	Yvonne Harrison	Puerto Rico	56.17
26	2	Klodiana Shala	Albania	57.81
27	4	Salhate Djamaldine	Comoros	58.88
	3	Mireille Nguimgo	Cameroon	DQ
	4	Karla Hernández	El Salvador	DQ

Semifinals

First 2 of each semifinal (Q) qualified directly for the final.

Rank	Heat	Name	Nationality	Time	Notes
1	1	Natalya Nazarova	Russia	50.90	Q
2	1	Christine Amertil	Bahamas	51.11	Q, NR
3	2	Grit Breuer	Germany	51.56	Q, SB
4	2	Catherine Murphy	Great Britain	51.74	Q, PB
5	2	Monique Hennagan	United States	51.89	Q, PB
6	1	Sviatlana Usovich	Belarus	52.18	Q
7	1	Sandie Richards	Jamaica	52.20	SB
8	1	Aliann Pompey	Guyana	52.74	SB
9	2	Grażyna Prokopek	Poland	53.07
10	1	Jennifer Meadows	Great Britain	53.36
	2	Yuliya Pechenkina	Russia	DQ
	2	Tonique Williams-Darling	Bahamas	DQ

Final

Rank	Name	Nationality	Time	Notes
	Natalya Nazarova	Russia	50.83
	Christine Amertil	Bahamas	51.11	NR
	Grit Breuer	Germany	51.13	SB
4	Catherine Murphy	Great Britain	51.99
5	Monique Hennagan	United States	52.08
6	Sviatlana Usovich	Belarus	52.72