400m hurdles (84.0cm) Result | IAAF World U18 Championships Nairobi 2017

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

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	320	Rovane Williams	JAM	51.94 Q PB	0.304
2	337	Moitalel Mpoke Naadokila	KEN	52.40 Q PB	0.303
3	176	Daojun Wang	CHN	53.21 q	0.245
4	528	Baptiste Christophe	FRA	53.24 q	0.190
5	455	Tihomir Djordjevic	SRB	54.30
6	108	Ayoub Mahrou	ALG	54.83	0.175
7	131	Matthew Thomspon	BAH	57.78	0.201
8	283	Halomoan Edwin Binsar	INA	1:08.62	0.184

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	437	Sokwakhana Zazini	RSA	49.63 Q	0.199
2	401	Luis Elespuru	PER	53.57 Q	0.168
3	469	Ting Hsuan Huang	TPE	53.74	0.208
4	445	Jahnaza Francis	SKN	54.67	0.201
5	373	Ruslem Zikry Putra Roseli	MAS	55.46	0.236
6	364	Oussama Hammi	MAR	55.80	0.258
7	352	Aleksandrs Kucs	LAT	56.22	0.218

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	150	Alison dos Santos	BRA	52.95 Q	0.193
2	247	Fabien Laroppe	FRA	53.06 Q PB	0.176
3	162	Chenggui Ding	CHN	54.02	0.223
4	107	Yacine Khedim	ALG	54.87	0.209
5	511	Andriy Vasylevskyy	UKR	55.10	0.198
6	365	Ismail Manyani	MAR	55.62	0.168
	341	David Kisoto Saruni	KEN	DQ	0.200
	206	Filip Ličman	CZE	DNS