Hosta

The Men's 50 metre backstroke competition at the 2017 World Championships was held on 29 and 30 July 2017.^[1][2]

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.^[3]

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.^[4]

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.^[5]

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

References