2017 World Championships in Athletics – Women's 400 metres
| Women's 400 metres at the 2017 World Championships |
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| Venue | Olympic Stadium | |||||||||
| Dates | 6 August (heats) 7 August (semifinal) 9 August (final) |
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| Competitors | 49 from 32 nations | |||||||||
| Medalists | ||||||||||
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| Events at the 2017 World Championships 
|
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|---|---|---|---|---|
| Track events | ||||
| 100 m | men | women | ||
| 200 m | men | women | ||
| 400 m | men | women | ||
| 800 m | men | women | ||
| 1500 m | men | women | ||
| 5000 m | men | women | ||
| 10,000 m | men | women | ||
| 100 m hurdles | women | |||
| 110 m hurdles | men | |||
| 400 m hurdles | men | women | ||
| 3000 m steeplechase |
men | women | ||
| 4 × 100 m relay | men | women | ||
| 4 × 400 m relay | men | women | ||
| Road events | ||||
| Marathon | men | women | ||
| 20 km walk | men | women | ||
| 50 km walk | men | women | ||
| Field events | ||||
| High jump | men | women | ||
| Pole vault | men | women | ||
| Long jump | men | women | ||
| Triple jump | men | women | ||
| Shot put | men | women | ||
| Discus throw | men | women | ||
| Hammer throw | men | women | ||
| Javelin throw | men | women | ||
| Combined events | ||||
| Heptathlon | women | |||
| Decathlon | men | |||
The women's 400 metres at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 6−7 and 9 August.
In wet conditions, Shaunae Miller-Uibo took an early lead, which she maintained coming onto the home stretch, with Allyson Felix in second and Phyllis Francis and Salwa Eid Naser gaining on both of them. Miller-Uibo stumbled and slowed to a jog, being passed by Francis, Felix, and Nasser. Francis continued on to win while Nasser, breaking her own national record, dipped past Felix on the line.
Before the competition, the records were as follows:
The standard to qualify automatically for entry was 52.10.
The event schedule, in local time (UTC+1), is as follows:
The first round took place on 6 August in six heats as follows:
The first three in each heat ( Q ) and the next six fastest ( q ) qualified for the semifinals. The overall results were as follows:
The semifinals took place on 7 August in three heats as follows:
The first two in each heat ( Q ) and the next two fastest ( q ) qualified for the final. The overall results were as follows:
The final took place on 9 August at 21:50. The results were as follows: (photo finish)
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