| | Event type

100 metres Breaststroke, Boys

Date	7 – 8 October 2018
Status	YOG
Location	Natatorium, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires
Participants	32 from 29 countries

Pos	Competitor	NOC	R1	SF	Final
1	Sun Jiajun	CHN	1:01.43 (1 h4)	1:00.61 (1 h1)	1:00.59 (1)	Gold
2	Denis Petrashov	KGZ	1:02.82 (3 h4)	1:01.95 (2 h1)	1:01.34 (2)	Silver
3	Taku Taniguchi	JPN	1:01.68 (2 h3)	1:02.08 (2 h2)	1:01.40 (3)	Bronze
4	Yu Hanaguruma	JPN	1:02.22 (1 h2)	1:01.99 (3 h1)	1:01.62 (4)
5	Michael Houlie	RSA	1:01.37 (1 h3)	1:00.23 (1 h2)	1:01.70 (5)
6	Caspar Corbeau	NED	1:02.74 (3 h3)	1:02.29 (4 h2)	1:01.81 (6)
7	Vladislav Gerasimenko	RUS	1:02.46 (2 h2)	1:02.15 (3 h2)	1:02.43 (7)
8	Jan Kałusowski	POL	1:02.63 (2 h4)	1:02.23 (4 h1)	1:02.69 (8)
9	Phạm Thành Bảo	VIE	1:02.99 (3 h2)	1:02.52 (5 h2)	–
10	Vitor de Souza	BRA	1:03.18 (4 h2)	1:02.69 (5 h1)	–
11	Sebestyén Böhm	HUN	1:03.21 (4 h4)	1:03.23 (6 h2)	–
12	Juri Dijkstra	NED	1:03.53 (5 h4)	1:03.10 (6 h1)	–
13	Santiago Saint-Upery	URU	1:03.55 (6 h4)	1:03.84 (8 h2)	–
14	Demirkan Demir	TUR	1:03.68 (4 h3)	1:04.05 (8 h1)	–
15	Moncef Balamane	ALG	1:03.72 (5 h3)	1:03.35 (7 h2)	–
16	André Klippenberg Grindheim	NOR	1:03.80 (6 h3)	1:03.65 (7 h1)	–
17	Alexander Milanovich	CAN	1:03.88 (7 h3)	–	–
18	Jānis Siliņš	LAT	1:04.06 (7 h4)	–	–
19	Maximillian Ang	SGP	1:04.24 (8 h3)	–	–
20	Aleksey Sidorchuk	UZB	1:04.31 (1 h1)	–	–
21	Marcus Mok	HKG	1:04.46 (5 h2)	–	–
22	Andrés Puente	MEX	1:04.69 (8 h4)	–	–
23	Ethan Dang	USA	1:04.72 (6 h2)	–	–
24	Dávid Gajdoš	SVK	1:04.87 (2 h1)	–	–
25	Didzis Rudavs	LAT	1:04.95 (7 h2)	–	–
26	Matija Može	SLO	1:04.96 (3 h1)	–	–
27	Izaak Bastian	BAH	1:05.21 (8 h2)	–	–
28	Luis Weekes	BAR	1:06.27 (4 h1)	–	–
29	José David Solís	CRC	1:06.32 (5 h1)	–	–
30	Samuele Rossi	SEY	1:07.28 (6 h1)	–	–
31	Leonard Kalate	PNG	1:07.53 (7 h1)	–	–
32	Simon Greuter	LIE	1:08.12 (8 h1)	–	–

Round One

Date	7 October 2018 — 11:00
Format	Top 16 advance to the semi-finals.

Heat #1

Time	11:00

Pos	Competitor	NOC	Time
1	Aleksey Sidorchuk	UZB	1:04.31
2	Dávid Gajdoš	SVK	1:04.87
3	Matija Može	SLO	1:04.96
4	Luis Weekes	BAR	1:06.27
5	José David Solís	CRC	1:06.32
6	Samuele Rossi	SEY	1:07.28
7	Leonard Kalate	PNG	1:07.53
8	Simon Greuter	LIE	1:08.12

Heat #2

Pos	Competitor	NOC	Time
1	Yu Hanaguruma	JPN	1:02.22	Q
2	Vladislav Gerasimenko	RUS	1:02.46	Q
3	Phạm Thành Bảo	VIE	1:02.99	Q
4	Vitor de Souza	BRA	1:03.18	Q
5	Marcus Mok	HKG	1:04.46
6	Ethan Dang	USA	1:04.72
7	Didzis Rudavs	LAT	1:04.95
8	Izaak Bastian	BAH	1:05.21

Heat #3

Pos	Competitor	NOC	Time
1	Michael Houlie	RSA	1:01.37	Q
2	Taku Taniguchi	JPN	1:01.68	Q
3	Caspar Corbeau	NED	1:02.74	Q
4	Demirkan Demir	TUR	1:03.68	Q
5	Moncef Balamane	ALG	1:03.72	Q
6	André Klippenberg Grindheim	NOR	1:03.80	Q
7	Alexander Milanovich	CAN	1:03.88
8	Maximillian Ang	SGP	1:04.24

Heat #4

Pos	Competitor	NOC	Time
1	Sun Jiajun	CHN	1:01.43	Q
2	Jan Kałusowski	POL	1:02.63	Q
3	Denis Petrashov	KGZ	1:02.82	Q
4	Sebestyén Böhm	HUN	1:03.21	Q
5	Juri Dijkstra	NED	1:03.53	Q
6	Santiago Saint-Upery	URU	1:03.55	Q
7	Jānis Siliņš	LAT	1:04.06
8	Andrés Puente	MEX	1:04.69

Semi-Finals

Date	7 October 2018 — 18:38
Format	Top 8 advance to the final round.

Heat #1

Time	18:38

Pos	Competitor	NOC	Time
1	Sun Jiajun	CHN	1:00.61	Q
2	Denis Petrashov	KGZ	1:01.95	Q
3	Yu Hanaguruma	JPN	1:01.99	Q
4	Jan Kałusowski	POL	1:02.23	Q
5	Vitor de Souza	BRA	1:02.69
6	Juri Dijkstra	NED	1:03.10
7	André Klippenberg Grindheim	NOR	1:03.65
8	Demirkan Demir	TUR	1:04.05

Heat #2

Pos	Competitor	NOC	Time
1	Michael Houlie	RSA	1:00.23	Q
2	Taku Taniguchi	JPN	1:02.08	Q
3	Vladislav Gerasimenko	RUS	1:02.15	Q
4	Caspar Corbeau	NED	1:02.29	Q
5	Phạm Thành Bảo	VIE	1:02.52
6	Sebestyén Böhm	HUN	1:03.23
7	Moncef Balamane	ALG	1:03.35
8	Santiago Saint-Upery	URU	1:03.84

Final Round

Date	8 October 2018 — 19:02

Pos	Competitor	NOC	Time
1	Sun Jiajun	CHN	1:00.59
2	Denis Petrashov	KGZ	1:01.34
3	Taku Taniguchi	JPN	1:01.40
4	Yu Hanaguruma	JPN	1:01.62
5	Michael Houlie	RSA	1:01.70
6	Caspar Corbeau	NED	1:01.81
7	Vladislav Gerasimenko	RUS	1:02.43
8	Jan Kałusowski	POL	1:02.69