Swimming at the 2009 World Aquatics Championships – Men's 100 metre freestyle
| Men's 100 metre freestyle at the 2009 FINA World Championships |
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| Venue | Foro Italico | |||||||||
| Dates | 29 July 2009 (heats, semifinals) 30 July 2009 (final) |
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| Competitors | 211 | |||||||||
| Winning time | 46.91 seconds | |||||||||
| Medalists | ||||||||||
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The men's 100 m freestyle at the 2009 World Championships took place on 29 July (heats and semifinals) and the evening of 30 July (finals) at the Foro Italico in Rome, Italy.
Existing records at the start of the 2009 Championships were:
Note: During the 4×100 m freestyle relay on Sunday, 26 July 2009, the CR in the 100 m freestyle was bettered 4 times by the following lead-off legs:
The following records were established during the competition:
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