Swimming at the 2017 World Aquatics Championships – Men's 50 metre backstroke

Men's 50 metre backstroke at the 2017 World Aquatics Championships
Venue	Danube Arena
Location	Budapest, Hungary
Dates	29 July (heats and semifinals) 30 July (final)
Competitors	55 from 46 nations
Winning time	24.35
Medalists
Camille Lacourt   France   Junya Koga   Japan   Matt Grevers   United States

The Men's 50 metre backstroke competition at the 2017 World Championships was held on 29 and 30 July 2017.

Records

Prior to the competition, the existing world and championship records were as follows.

World record	Liam Tancock (GBR)	24.04	Rome, Italy	2 August 2009
Competition record	Liam Tancock (GBR)	24.04	Rome, Italy	2 August 2009

Results

Heats

The heats were held on 29 July at 09:51.

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	6	5	Junya Koga	Japan	24.54	Q
2	5	4	Camille Lacourt	France	24.58	Q
3	6	4	Xu Jiayu	China	24.78	Q
	7	5	Matt Grevers	United States		Q
5	5	3	Jérémy Stravius	France	24.80	Q
6	7	7	Jonatan Kopelev	Israel	24.86	Q
	7	4	Justin Ress	United States		Q
8	5	5	Grigoriy Tarasevich	Russia	24.88	Q
9	5	6	Richárd Bohus	Hungary	24.93	Q
10	6	6	Pavel Sankovich	Belarus	24.94	Q, NR
11	5	1	Apostolos Christou	Greece	24.99	Q
12	5	0	Won Young-jun	South Korea	25.10	Q
	7	3	Tomasz Polewka	Poland		Q
14	6	3	Guilherme Guido	Brazil	25.13	Q
15	4	3	Javier Acevedo	Canada	25.16	Q
16	6	1	I Gede Siman Sudartawa	Indonesia	25.17	Q
17	6	2	Kliment Kolesnikov	Russia	25.23
18	6	8	Matteo Milli	Italy	25.24
	7	6	Mitch Larkin	Australia
20	7	2	Marek Ulrich	Germany	25.27
21	7	8	Bohdan Kasian	Ukraine	25.31
22	5	8	Josh Beaver	Australia	25.44
23	5	2	Shane Ryan	Ireland	25.48
24	6	7	Guy Barnea	Israel	25.52
25	4	4	Mohamed Samy	Egypt	25.55
	7	1	Viktar Staselovich	Belarus
27	4	6	Charles Hockin	Paraguay	25.56
	5	7	Gábor Balog	Hungary
	6	0	Dmytro Gurnytskyi	Ukraine
30	7	9	Quah Zheng Wen	Singapore	25.58
31	7	0	Kacper Stokowski	Poland	25.63
32	6	9	Lê Nguyễn Paul	Vietnam	25.64
33	4	8	Markus Lie	Norway	25.71
34	4	5	Ralf Tribuntsov	Estonia	25.78
35	5	9	Gytis Stankevičius	Lithuania	25.90
36	4	2	Robinson Molina	Venezuela	25.94
37	4	7	Daniel Hunter	New Zealand	26.02
38	4	9	Gabriel Lópes	Portugal	26.05
39	3	4	Girts Feldberg	Latvia	26.27
40	3	3	Christopher Courtis	Barbados	26.42
41	3	5	Mehdi Benbara	Algeria	26.57
42	3	6	Driss Lahrichi	Morocco	26.60
43	3	7	Madhu Prathapan	India	27.17
44	3	2	David van der Colff	Botswana	27.67
45	3	1	Narang Pornsiriporn	Thailand	27.84
46	2	7	Juwel Ahmmed	Bangladesh	28.50
47	1	4	Muhammad Khan	Pakistan	28.97
48	3	8	Jayhan Odlum-Smith	Saint Lucia	29.95
49	3	0	Nabeel Hatoum	Palestine	30.69
50	1	3	Thol Thoeun	Cambodia	30.72
51	2	6	Santisouk Inthavong	Laos	31.96
52	2	1	Billy-Scott Irakose	Burundi	33.14
53	2	8	Ramziyor Khorkashov	Tajikistan	33.89
54	2	5	Ebrahim Al-Maleki	Yemen	34.07
55	3	9	Ablam Awoussou	Benin	34.47
	1	5	Adama Ndir	Senegal	DNS
	2	4	Moris Beale	Sierra Leone
	2	2	Chaoili Aonzoudine	Comoros
	2	3	Tano Atta	Ivory Coast
	4	0	Omar Pinzón	Colombia

Semifinals

The semifinals were held on 29 July at 18:45.

Semifinal 1

Rank	Lane	Name	Nationality	Time	Notes
1	4	Camille Lacourt	France	24.30	Q
2	5	Matt Grevers	United States	24.65	Q
3	2	Pavel Sankovich	Belarus	24.74	Q, NR
4	3	Jonatan Kopelev	Israel	24.84	Q
5	6	Grigoriy Tarasevich	Russia	24.86
6	1	Guilherme Guido	Brazil	24.91
7	7	Won Young-jun	South Korea	25.02	NR
8	8	I Gede Siman Sudartawa	Indonesia	25.04	NR

Semifinal 2

Rank	Lane	Name	Nationality	Time	Notes
1	4	Junya Koga	Japan	24.44	Q
2	5	Xu Jiayu	China	24.67	Q
3	6	Justin Ress	United States	24.70	Q
4	3	Jérémy Stravius	France	24.81	Q
5	2	Richárd Bohus	Hungary	24.88
5	7	Apostolos Christou	Greece	24.88
7	1	Tomasz Polewka	Poland	24.95
8	8	Javier Acevedo	Canada	25.13	=NR

Final

The final was held on 30 July at 18:05.

Rank	Lane	Name	Nationality	Time	Notes
	4	Camille Lacourt	France	24.35
	5	Junya Koga	Japan	24.51
	3	Matt Grevers	United States	24.56
4	1	Jérémy Stravius	France	24.61
5	6	Xu Jiayu	China	24.74
6	2	Justin Ress	United States	24.77
7	7	Pavel Sankovich	Belarus	24.83
8	8	Jonatan Kopelev	Israel	24.85