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Boys' 100 metre breaststroke at the 2018 Summer Youth Olympics
Venue	Natatorium
Dates	7 October (heats, semifinals) 8 October (final)
Competitors	32 from 29 nations
Winning time	1:00.59
Medalists
Sun Jiajun    China   Denis Petrashov    Kyrgyzstan   Taku Taniguchi    Japan
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Swimming at the 2018 Summer Youth Olympics
Freestyle
50 m	boys	girls
100 m	boys	girls
200 m	boys	girls
400 m	boys	girls
800 m	boys	girls
Backstroke
50 m	boys	girls
100 m	boys	girls
200 m	boys	girls
Breaststroke
50 m	boys	girls
100 m	boys	girls
200 m	boys	girls
Butterfly
50 m	boys	girls
100 m	boys	girls
200 m	boys	girls
Individual medley
200 m	boys	girls
Freestyle relay
4×100 m	boys	girls
	mixed
Medley relay
4×100 m	boys	girls
	mixed
v t e

The boys' 100 metre breaststroke event at the 2018 Summer Youth Olympics took place on 7 and 8 October at the Natatorium in Buenos Aires, Argentina.

Results

Heats

The heats were started on 7 October at 11:00.

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	3	5	Michael Houlie	South Africa	1:01.37	Q
2	4	4	Sun Jiajun	China	1:01.43	Q
3	3	4	Taku Taniguchi	Japan	1:01.68	Q
4	2	5	Yu Hanaguruma	Japan	1:02.22	Q
5	2	4	Vladislav Gerasimenko	Russia	1:02.46	Q
6	4	3	Jan Kałusowski	Poland	1:02.63	Q
7	3	3	Caspar Corbeau	Netherlands	1:02.74	Q
8	4	5	Denis Petrashov	Kyrgyzstan	1:02.82	Q
9	2	7	Phạm Thanh Bảo	Vietnam	1:02.99	Q
10	2	3	Vitor de Souza	Brazil	1:03.18	Q
11	4	7	Sebestyén Böhm	Hungary	1:03.21	Q
12	4	6	Juri Dijkstra	Netherlands	1:03.53	Q
13	4	8	Santiago Saint-Upery	Uruguay	1:03.55	Q
14	3	7	Demirkan Demir	Turkey	1:03.68	Q
15	3	1	Moncef Aymen Balamane	Algeria	1:03.72	Q
16	3	2	André Klippenberg Grindheim	Norway	1:03.80	Q
17	3	6	Alexander Milanovich	Canada	1:03.88
18	4	1	Jānis Vitauts Siliņš	Latvia	1:04.06
19	3	8	Maximillian Ang	Singapore	1:04.24
20	1	4	Aleksey Sidorchuk	Uzbekistan	1:04.31
21	2	8	Marcus Mok	Hong Kong	1:04.46
22	4	2	Andrés Puente	Mexico	1:04.69
23	2	2	Ethan Dang	United States	1:04.72
24	1	2	Dávid Gajdoš	Slovakia	1:04.87
25	2	1	Didzis Rudavs	Latvia	1:04.95
26	1	3	Matija Može	Slovenia	1:04.96
27	2	6	Izaak Bastian	Bahamas	1:05.21
28	1	6	Luis Weekes	Barbados	1:06.27
29	1	5	David Solis	Costa Rica	1:06.32
30	1	8	Samuele Rossi	Seychelles	1:07.28
31	1	1	Leonard Kalate	Papua New Guinea	1:07.53
32	1	7	Simon Greuter	Liechtenstein	1:08.12

Semifinals

The semifinals were started on 7 October at 18:38.

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	2	4	Michael Houlie	South Africa	1:00.23	Q
2	1	4	Sun Jiajun	China	1:00.61	Q
3	1	6	Denis Petrashov	Kyrgyzstan	1:01.95	Q
4	1	5	Yu Hanaguruma	Japan	1:01.99	Q
5	2	5	Taku Taniguchi	Japan	1:02.08	Q
6	2	3	Vladislav Gerasimenko	Russia	1:02.15	Q
7	1	3	Jan Kałusowski	Poland	1:02.23	Q
8	2	6	Caspar Corbeau	Netherlands	1:02.29	Q
9	2	2	Phạm Thanh Bảo	Vietnam	1:02.52
10	1	2	Vitor de Souza	Brazil	1:02.69
11	1	7	Juri Dijkstra	Netherlands	1:03.10
12	2	7	Sebestyén Böhm	Hungary	1:03.23
13	2	8	Moncef Aymen Balamane	Algeria	1:03.35
14	1	8	André Klippenberg Grindheim	Norway	1:03.65
15	2	1	Santiago Saint-Upery	Uruguay	1:03.84
16	1	1	Demirkan Demir	Turkey	1:04.05

Final

The final was held on 8 October at 19:02.

Rank	Lane	Name	Nationality	Time	Notes
	5	Sun Jiajun	China	1:00.59
	3	Denis Petrashov	Kyrgyzstan	1:01.34
	2	Taku Taniguchi	Japan	1:01.40
4	6	Yu Hanaguruma	Japan	1:01.62
5	4	Michael Houlie	South Africa	1:01.70
6	8	Caspar Corbeau	Netherlands	1:01.81
7	7	Vladislav Gerasimenko	Russia	1:02.43
8	1	Jan Kałusowski	Poland	1:02.69

References

1. "Swimming – Competition Schedule" (PDF). buenosaires2018.com. 7 October 2018. Retrieved 31 October 2018.
2. Heats results
3. Semifinals results
4. Final results

• Swimming at the 2018 Summer Youth Olympics