Swimming at the 2019 World Aquatics Championships – Men's 100 metre butterfly explained

Event:	Men's 100 metre butterfly
Championship:	2019 World Aquatics Championships
Dates:	26 July (heats and semifinals) 27 July (final)
Venue:	Nambu University Municipal Aquatics Center
Location:	Gwangju, South Korea
Competitors:	78
Nations:	73
Win Value:	49.66
Gold:	Caeleb Dressel
Gold Nation:	USA
Silver:	Andrey Minakov
Silver Nation:	RUS
Bronze:	Chad le Clos
Bronze Nation:	RSA
Prev:	2017
Next:	2022

The Men's 100 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019.^{[1] [2]} The defending champion Caeleb Dressel broke Michael Phelps' ten-year-old record by 0.32 second in the semi-final, setting a new world-record time of 49.50 seconds.^[3] Dressel won the final held the following day, defending his title.^[4]

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.^[5]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	9	4			50.28	Q
2	7	2			51.42	Q
3	9	3			51.54	Q
4	7	4			51.58	Q
5	9	5			51.65	Q
6	9	6			51.83	Q
7	9	7			51.88	Q
8	8	2			51.89	Q
9	8	5			51.96	Q
10	7	3			52.05	Q
11	8	3			52.06	Q
12	8	6			52.23	Q
13	7	1			52.36	Q
14	7	6			52.44	Q
14	9	1			52.44	Q
14	9	2			52.44	Q
17	7	8			52.46
18	8	9			52.55	NR
19	7	7			52.65
20	8	7			52.77
21	6	2			52.86
22	9	8			52.87
23	6	4			52.92
24	7	5			52.93
24	8	0			52.93
26	8	4			53.09
27	8	8			53.15
28	6	1			53.39
29	7	9			53.41
30	8	1			53.46
31	5	6			53.52	NR
32	5	4			53.58
33	6	6			53.62
34	6	3			53.64
35	6	5			53.70
36	5	5			53.73
37	6	9			53.78
38	5	3			53.85
39	6	8			54.11
40	5	7			54.21
41	6	0			54.30
42	5	8			54.36
43	5	0			54.38
44	6	7			54.57
45	1	5			54.67
46	4	4			54.79
47	5	2			54.94	NR
47	5	9			54.94
49	5	1			55.14
50	4	6			55.15	NR
51	4	3			55.63
52	4	5			55.66
53	4	2			56.03
54	4	1			56.04
55	4	0			56.31
56	2	5			56.52
57	4	7			56.54
58	3	5			56.58
59	4	8			56.62
60	3	4			57.26
61	3	3			57.29
62	3	8			57.32
63	1	3			57.65
64	3	7			58.06
65	3	1			58.12
66	4	9			58.26
67	1	4			58.44	NR
68	3	0			58.82
69	3	6			58.91
70	3	2
71	2	1
72	2	3
73	3	9
74	2	2
75	2	8
76	2	4
77	2	7
	2	6
	7	0
	9	0
	9	9

Semifinals

The semifinals were held on 26 July at 20:10.^[6]

Semifinal 1

Rank	Lane	Name	Nationality	Time	Notes
1	4			50.95	Q
2	5			51.40	Q
3	2			51.50	Q
4	6			51.70	Q
5	7			51.71
6	3			51.92
7	1			52.00
8	8			52.20

Semifinal 2

Rank	Lane	Name	Nationality	Time	Notes
1	4			49.50	Q,
2	5			50.94	Q, NR
3	3			51.62	Q
4	7			51.69	Q
5	6			51.86
6	2			51.91
7	1			52.15	NR
8	8			52.55

Final

The final was started on 27 July at 20:43.^[7]

Rank	Lane	Name	Nationality	Time	Notes
	4			49.66
	5			50.83	NR
	6			51.16
4	3			51.26
5	7			51.38
6	8			51.51
7	1			51.62
8	2			51.66

Notes and References

1. https://www.fina.org/sites/default/files/general/fina_wch_gwangju_2019_-_comeptition_schedule_-_rev.18.06.2019.pdf Schedule
2. http://omegatiming.com/File/00011301070104EC01FFFFFFFFFFFF00.pdf Start list
3. News: World Aquatics Championships: Caeleb Dressel breaks Michael Phelps' 10-year-old world record . BBC . July 26, 2019 .
4. News: American swimmer Caeleb Dressel wins three titles in one night at World Championships, puts gold medal count at six . Shanna . McCarriston. 27 July 2019 . CBS Sports .
5. http://www.omegatiming.com/File/00011301070104EC01FFFFFFFFFFFF01.pdf Heats results
6. http://www.omegatiming.com/File/00011301070104EC02FFFFFFFFFFFF01.pdf Semifinals results
7. http://omegatiming.com/File/00011301070104EC04FFFFFFFFFFFF01.pdf Final results