Swimming at the 2004 Summer Olympics – Men's 100 metre butterfly
Records
Prior to this competition, the existing world and Olympic records were as follows. The following new world and Olympic records were set during this competition.

Swimming at the 2004 Summer Olympics – Men's 100 metre butterfly

Section Title: Records
Table Section Text: Prior to this competition, the existing world and Olympic records were as follows. The following new world and Olympic records were set during this competition.

Date	Event	Name	Nationality	Time	Record

August 19	Semifinal 1	Andriy Serdinov	Ukraine	51.74	OR

August 19	Semifinal 2	Michael Phelps	United States	51.61	OR

August 20	Final	Michael Phelps	United States	51.25	OR

Sentence(s)

In the semifinals, Serdinov blasted a new Olympic record with a time of 51.74.

final_sentence: In the semifinals, Serdinov blasted a new Olympic record with a time of 51.74.