The Men's 100 metre butterfly competition at the
2019 World Championships was held on 26 and 27 July 2019. The defending champion
Caeleb Dressel
Caeleb Remel Dressel (born August 16, 1996) is an American competitive swimmer who specializes in freestyle, butterfly, and individual medley events. He swims representing the Cali Condors as part of the International Swimming League. He won ...
broke
Michael Phelps
Michael Fred Phelps II (born June 30, 1985) is an American former competitive swimmer. He is the most successful and most decorated Olympian of all time with a total of 28 medals. Phelps also holds the all-time records for Olympic gold me ...
' ten-year-old record by 0.32 second in the semi-final, setting a new world-record time of 49.50 seconds. Dressel won the final held the following day, defending his title.
Records
Prior to the competition, the existing world and championship records were as follows.
The following new records were set during this competition.
Results
Heats
The heats were held on 26 July at 10:00.
Semifinals
The semifinals were held on 26 July at 20:10.
Semifinal 1
Semifinal 2
Final
The final was started on 27 July at 20:43.
Final results
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References
{{DEFAULTSORT:2019 World Aquatics Championships - Men's 100 metre butterfly
Men's 100 metre butterfly