400 Metres Summary | 14th IAAF World Junior Championships

First 2 in each heat (Q) and the next 2 fastest (q)

POS	Rank	Heat	BIB	ATHLETE	COUNTRY	RESULTS
1	1	3	901	Aldrich Bailey Jr	USA	45.79 Q
2	1	1	228	Luguelín Santos	DOM	45.98 Q
3	2	3	515	Javon Francis	JAM	46.06 Q PB
4	2	1	40	Steven Solomon	AUS	46.07 Q
5	3	3	574	Boniface Ontuga Mweresa	KEN	46.20 q
6	1	2	917	Arman Hall	USA	46.42 Q
7	3	1	568	Alphas Leken Kishoyian	KEN	46.46 q
8	4	1	778	Nikita Uglov	RUS	46.49 q
9	4	3	702	Patryk Dobek	POL	46.56
10	2	2	854	Machel Cedenio	TTO	46.59 Q
11	5	3	31	Jarryd Buchan	AUS	46.81 PB
11	3	2	689	Andrew Whyte	NZL	46.81
13	4	2	958	José Meléndez	VEN	46.83
14	5	2	751	Pieter Conradie	RSA	46.87
15	5	1	489	Michele Tricca	ITA	46.92
16	6	2	52	O'Jay Ferguson	BAH	47.02
17	6	3	491	Marco Lorenzi	ITA	47.25
18	7	2	417	Stephan James	GUY	47.35
19	5	1	202	Mateo Ružić	CRO	47.46
20	7	1	588	Basheer Atiah Al Barakati	KSA	47.48
21	7	3	403	Daniel Gyasi	GHA	47.78
22	8	2	780	Nikita Vesnin	RUS	48.02
23	8	1	748	Sorin Vatamanu	ROU	48.15
24	8	3	246	Julio Arenas	ESP	50.00

400 Metres men