9th IAAF World Indoor Championships. 2003 Birmingham, Great Britain
Men 4 x 400 meter Relays
Heat 1
| Pos | Lane | Team | NOC | Mark | React | |
| 1 | 6 | United States | USA | 3:04.17 | 0.179 | Q |
| 2 | 4 | Jamaica | JAM | 3:06.46 | 0.147 | Q |
| 3 | 3 | Great Britain & N.I. | GBR | 3:06.60 | 0.149 | q |
| 5 | Ireland | IRL | DNS | 0 |
Heat 2
| Pos | Lane | Team | NOC | Mark | React | |
| 1 | 6 | Russia | RUS | 3:08.71 | 0.165 | Q |
| 2 | 3 | Poland | POL | 3:16.10 | 0.153 | Q |
| 5 | Bahamas | BAH | DQ | 0.140 | ||
| 4 | Spain | ESP | DQ | 0.187 |
| Pos | Lane | Team | NOC | Mark | React |
| 1 | 5 | United States | USA | 3:04.09 | 0.184 |
| 2 | 4 | Jamaica | JAM | 3:04.21 | 0.133 |
| 3 | 2 | Great Britain & N.I. | GBR | 3:06.12 | 0.165 |
| 4 | 3 | Poland | POL | 3:06.61 | 0.161 |
| 6 | Russia | RUS | DQ | 0.210 |
Women 4 x 400 meter Relays
| Pos | Lane | Team | NOC | Mark | React |
| 1 | 6 | Russia | RUS | 3:28.45 | 0.147 |
| 2 | 4 | Jamaica | JAM | 3:31.23 | 0.157 |
| 3 | 2 | United States | USA | 3:31.69 | 0.208 |
| 4 | 5 | Great Britain & N.I. | GBR | 3:32.18 | 0.183 |
| 5 | 3 | Ukraine | UKR | 3:36.18 | 0.191 |
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