4 × 100 metres Medley Relay, Boys

Date	10 October 2018
Status	YOG
Location	Natatorium, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires
Participants	36 from 9 countries

Pos	Swimmer	NOC	R1	Final
1	Russian Federation	RUS	3:43.50 (1 h2)	3:35.17 (1)	Gold
	Kliment Kolesnikov • Vladislav Gerasimenko • Andrey Minakov • Daniil Markov
2	People's Republic of China	CHN	3:45.74 (2 h2)	3:38.65 (2)	Silver
	Wang Guanbin • Sun Jiajun • Shen Jiahao • Hong Jinquan
3	Poland	POL	3:45.31 (1 h1)	3:41.51 (3)	Bronze
	Jakub Kraska • Jan Kałusowski • Jakub Majerski • Bartłomiej Koziejko
4	Hungary	HUN	3:45.41 (3 h1)	3:43.60 (4)
	Gábor Zombori • Sebestyén Böhm • Kristóf Milák • Ákos Kalmár
5	Italy	ITA	3:47.31 (5 h1)	3:45.23 (5)
	Johannes Calloni • Thomas Ceccon • Federico Burdisso • Marco De Tullio
6	Canada	CAN	3:46.23 (4 h1)	3:45.45 (6)
	Sebastian Somerset • Alexander Milanovich • Joshua Liendo • Finlay Knox
7	South Africa	RSA	3:47.78 (3 h2)	3:45.90 (7)
	Hendrik Duvenhage • Michael Houlie • Ethan du Preez • Gabriel Nortje
AC r2/2	Japan	JPN	3:45.34 (2 h1)	– (DQ)
	Keisuke Yoshida • Yu Hanaguruma • Shinnosuke Ishikawa • Taku Taniguchi
9	United States	USA	3:47.91 (4 h2)	–
	Ethan Harder • Ethan Dang • Jake Johnson • Will Barao
DNS	Australia	AUS	– (DNS h2)	–

DNS	Brazil	BRA	– (DNS h2)	–

Round One (10 October 2018 — 11:01)

Top 8 advance to the final round.

Heat One (11:01)

Pos	Lane	Swimmer	NOC	Time	Exchange (Pos)
1	–	Poland	POL		3:45.31			Q
		Jakub Kraska		56.62	– (–)
		Jan Kałusowski		1:03.71	– (–)
		Jakub Majerski		52.64	– (–)
		Bartłomiej Koziejko		52.34	– (–)
2	–	Japan	JPN		3:45.34			Q
		Keisuke Yoshida		59.16	– (–)
		Yu Hanaguruma		1:01.66	– (–)
		Shinnosuke Ishikawa		52.41	– (–)
		Taku Taniguchi		52.11	– (–)
3	–	Hungary	HUN		3:45.41			Q
		Gábor Zombori		56.76	– (–)
		Sebestyén Böhm		1:03.56	– (–)
		Kristóf Milák		52.58	– (–)
		Ákos Kalmár		52.51	– (–)
4	–	Canada	CAN		3:46.23			Q
		Sebastian Somerset		57.24	– (–)
		Alexander Milanovich		1:03.51	– (–)
		Joshua Liendo		53.58	– (–)
		Finlay Knox		51.90	– (–)
5	–	Italy	ITA		3:47.31			Q
		Johannes Calloni		57.13	– (–)
		Thomas Ceccon		1:05.77	– (–)
		Federico Burdisso		52.58	– (–)
		Marco De Tullio		51.83	– (–)

Heat Two

Pos	Lane	Swimmer	NOC	Time	Exchange (Pos)
1	–	Russian Federation	RUS		3:43.50			Q
		Kliment Kolesnikov		53.62	– (–)
		Vladislav Gerasimenko		1:02.27	– (–)
		Andrey Minakov		55.58	– (–)
		Daniil Markov		52.03	– (–)
2	–	People's Republic of China	CHN		3:45.74			Q
		Wang Guanbin		56.93	– (–)
		Sun Jiajun		1:02.65	– (–)
		Shen Jiahao		53.34	– (–)
		Hong Jinquan		52.82	– (–)
3	–	South Africa	RSA		3:47.78			Q
		Hendrik Duvenhage		58.80	– (–)
		Michael Houlie		1:00.78	– (–)
		Ethan du Preez		56.97	– (–)
		Gabriel Nortje		51.23	– (–)
4	–	United States	USA		3:47.91
		Ethan Harder		57.01	– (–)
		Ethan Dang		1:03.47	– (–)
		Jake Johnson		54.97	– (–)
		Will Barao		52.46	– (–)
DNS	–	Australia	AUS		–
DNS	–	Brazil	BRA		–

Final Round (10 October 2018 — 19:32)

Pos	Lane	Swimmer	NOC	Time	Exchange (Pos)
1	–	Russian Federation	RUS		3:35.17
		Kliment Kolesnikov		53.34	– (–)
		Vladislav Gerasimenko		1:01.50	– (–)
		Andrey Minakov		51.14	– (–)
		Daniil Markov		49.19	– (–)
2	–	People's Republic of China	CHN		3:38.65
		Wang Guanbin		55.82	– (–)
		Sun Jiajun		1:00.12	– (–)
		Shen Jiahao		52.65	– (–)
		Hong Jinquan		50.06	– (–)
3	–	Poland	POL		3:41.51
		Jakub Kraska		55.79	– (–)
		Jan Kałusowski		1:01.92	– (–)
		Jakub Majerski		52.00	– (–)
		Bartłomiej Koziejko		51.80	– (–)
4	–	Hungary	HUN		3:43.60
		Gábor Zombori		56.40	– (–)
		Sebestyén Böhm		1:02.75	– (–)
		Kristóf Milák		51.87	– (–)
		Ákos Kalmár		52.58	– (–)
5	–	Italy	ITA		3:45.23
		Johannes Calloni		56.83	– (–)
		Thomas Ceccon		1:03.42	– (–)
		Federico Burdisso		52.83	– (–)
		Marco De Tullio		52.15	– (–)
6	–	Canada	CAN		3:45.45
		Sebastian Somerset		57.10	– (–)
		Alexander Milanovich		1:03.29	– (–)
		Joshua Liendo		53.89	– (–)
		Finlay Knox		51.17	– (–)
7	–	South Africa	RSA		3:45.90
		Hendrik Duvenhage		57.98	– (–)
		Michael Houlie		1:01.08	– (–)
		Ethan du Preez		55.95	– (–)
		Gabriel Nortje		50.89	– (–)
DQ	–	Japan	JPN		–
		Keisuke Yoshida		1:00.11	– (–)
		Yu Hanaguruma		1:02.39	– (–)
		Shinnosuke Ishikawa		–	– (–)
		Taku Taniguchi		–	– (–)