Swimming at the 2003 World Aquatics Championships – Men's 100 metre backstroke

Men's 100m Backstroke at the 2003 FINA World Aquatics Championships
Dates	21 July (prelims, semifinals) 22 July (final)
Winning time	53.61 seconds
Medalists
Aaron Peirsol    United States   Arkady Vyatchanin    Russia   Matt Welsh    Australia
←  2005 →

The Men's 100 Backstroke event at the 10th FINA World Aquatics Championships swam 21 – 22 July 2003 in Barcelona, Spain. Preliminary^[1] and Semifinal^[2] heats swam on July 21; the Final^[3] was held on July 22.

At the start of the event, the existing World (WR) and Championship (CR) records were:

• WR: 53.60 swum by Lenny Krayzelburg (USA) on August 24, 1999 in Sydney, Australia
• CR: 54.31 swum by Matt Welsh (Australia) on July 23, 2001 in Fukuoka, Japan

Results[]

Final[]

Place	Swimmer	Nation	Time	Notes
1	Aaron Peirsol	USA	53.61	CR
2	Arkady Vyatchanin	Russia	53.92
2	Matt Welsh	Australia	53.92
4	Steffen Driesen	Germany	54.17
5	Markus Rogan	Austria	54.53
6	Tomomi Morita	Japan	54.86
7	László Cseh	Hungary	54.95
8	Alex Lim	Malaysia	55.18

Semifinals[]

Rank	Heat + Lane	Swimmer	Nation	Time	Notes
1	S2 L5	Aaron Peirsol	USA	54.28	q, CR
2	S1 L4	Arkady Vyatchanin	Russia	54.49	q
3	S1 L1	Steffen Driesen	Germany	54.60	q
4	S2 L4	Matt Welsh	Australia	54.77	q
4	S2 L8	Alex Lim	Malaysia	54.77	q
6	S2 L2	Markus Rogan	Austria	55.11	q
7	S2 L3	László Cseh	Hungary	55.12	q
8	S1 L5	Tomomi Morita	Japan	55.17	q
9	S2 L6	Ouyang Kunpeng	China	55.21
10	S1 L3	Blaž Medvešek	Slovenia	55.30
11	S1 L7	Simon Dufour	France	55.31
12	S1 L8		Japan	55.36
13	S2 L1	Răzvan Florea	Romania	55.42
14	S1 L2	Örn Arnarson	Iceland	55.67
15	S1 L6	Yoav Gath	Israel	55.71
16	S2 L7	Péter Horváth	Hungary	55.83

Preliminaries[]

Rank	Heat+Lane	Swimmer	Nation	Time	Notes
1	H12 L4	Matt Welsh		54.79	q
2	H10 L2	Arkady Vyatchanin		54.81	q
3	H11 L4	Aaron Peirsol		54.99	q
4	H12 L6	Tomoni Morita		55.06	q
5	H11 L7	László Cseh		55.11	q
6	H10 L8	Blaž Medvešek		55.28	q
7	H11 L1	Ouyang Kunpeng		55.29	q
8	H08 L4	Yoav Gath		55.41	q
9	H11 L5	Markus Rogan		55.42	q
10	H09 L8	Örn Arnarson		55.47	q
10	H10 L3	Péter Horváth		55.47	q
12	H11 L2	Simon Dufour		55.49	q
13	H09 L1	Răzvan Florea		55.56	q
13	H10 L5	Steffen Driesen		55.56	q
15	H11 L6	Alex Lim		55.62	q
16	H12 L5			55.67	q
17	H10 L7	Riley Janes		55.76
18	H12 L8	Gerhard Zandberg		55.80
19	H12 L3	Josh Watson		55.81
20	H09 L5	Karel Novy		55.82
21	H12 L1	David Ortega		55.85
22	H12 L7			55.90
23	H10 L6	Gordan Kožulj		55.94
24	H09 L4	Ahmed Hussein		55.95
25	H08 L2	Darius Grigalionis		56.00
26	H08 L7	Ryan Pini		56.06
27	H10 L1	Volodymyr Nikolaychuk		56.14
28	H09 L7	Cameron Gibson		56.22
29	H12 L2	Evgueni Alechine		56.31
30	H11 L3	Pierre Roger		56.34
31	H11 L8	Min Sung		56.38
32	H07 L6	Pavel Suškov		56.42
33	H09 L2	Jorge Sánchez		56.44
34	H08 L6	Klaas Erik Zwering		56.58
35	H07 L4	Pavlo Illichov		56.60
36	H09 L3	Rui Yu		56.77
37	H09 L6	Paulo Machado		57.01
38	H08 L3	Nuno Laurentino		57.10
39	H08 L1	Flori Lang		57.12
40	H07 L7			57.36
41	H07 L5	Keith Beavers		57.54
42	H07 L1			57.69
42	H08 L5			57.69
44	H01 L6	Mattias Ohlin		57.75
45	H08 L8	Gabriel Mangabeira		58.08
46	H07 L3	Alexandr Ivlev		58.53
47	H07 L2	Andrei Mihailov		58.67
48	H07 L8	Nicholas Bovell		59.42
49	H06 L4	Mauricio Prudencio		59.62
50	H06 L8	Jared Heine		1:00.13
51	H06 L3	Ashby Brendan		1:00.21
52	H06 L7			1:00.87
53	H06 L2			1:01.38
54	H06 L1			1:01.44
55	H05 L4			1:02.06
56	H06 L5			1:02.38
57	H05 L1			1:02.40
58	H04 L3			1:02.49
59	H05 L5	Danil Bugakov		1:02.67
60	H05 L7			1:02.75
61	H06 L6	Yury Zaharov		1:02.91
62	H04 L4	James Walsh		1:03.72
63	H05 L3	Abed Rahman Kaaki		1:03.77
64	H05 L6			1:03.84
65	H04 L5			1:03.86
66	H03 L5	Onan Thom		1:03.91
67	H04 L6			1:04.31
68	H04 L2			1:04.45
69	H03 L6			1:04.80
70	H05 L2			1:05.35
71	H04 L8			1:05.50
72	H04 L1			1:05.62
73	H05 L8	Rony Bakale		1:05.82
74	H03 L2			1:06.49
75	H02 L5			1:07.14
76	H03 L3	Daniel Kang		1:07.92
77	H03 L4			1:08.19
78	H03 L7			1:09.18
79	H02 L1			1:10.71
80	H02 L6			1:11.15
81	H01 L4			1:12.30
82	H02 L2	Leonel Matonse		1:13.11
83	H02 L8			1:13.75
84	H03 L8			1:14.23
-	-	Randall Bal		DQ
-	-			DNS
-	-			DNS
-	-			DNS
-	-			DNS

References[]