400m hurdles (84.0cm) Result | 8th IAAF World Youth Championships

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

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	227	Yang Wang	CHN	50.72 Q WYL	0.189
2	911	Kenneth SELMON	USA	50.95 Q	0.202
3	554	Geofrey Kipkoech Cheruiyot	KEN	51.01 q PB	0.177
4	533	Naoya Okubo	JPN	52.03 PB	0.202
5	465	Matteo Beria	ITA	52.18 PB	0.188
6	139	Xavier Coakley	BAH	53.78	0.162
7	745	Vladislav Omelchenko	RUS	54.30	0.156
8	836	Raouf Jedid	TUN	55.30	0.236

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	515	Marvin Williams	JAM	51.31 Q PB	0.163
2	684	Derick Diaz	PUR	51.95 Q PB	0.284
3	596	Avotriniaina Rakotoarimiandry	MAD	52.11 PB	0.182
4	467	Giuseppe Biondo	ITA	52.45	0.191
5	297	Javier Delgado	ESP	52.84	0.189
6	450	Mahmoud Reza Moshtagh	IRI	52.88 PB	0.222
7	837	Mohamed Fares JLASSI	TUN	52.96	0.474
8	627	Divan Rossouw	NAM	55.75	0.204

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	516	Okeen Williams	JAM	50.53 Q WYL	0.170
2	899	Marlon Humphrey	USA	50.96 Q	0.166
3	517	Takumu Furuya	JPN	51.00 q PB	0.146
4	316	Ryan Wallis	ESP	52.21 PB	0.172
5	117	Rai BENJAMIN	ANT	52.36 PB	0.167
6	716	Hanno Coetzer	RSA	53.60	0.191
7	694	Khalid Mohammed Al-Shahrani	QAT	54.26	0.201
8	186	Daniel Brady	CAN	54.78	0.169