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2009  World  Top 20 Compiled by Mirko Jalava, Tilastopaja Oy. Text version here.

Men
400 m hurdles
1	47.91			Kerron Clement	USA	31 Oct 85	188/84	1	WC	Berlin	18 Aug
2	47.94			LJ van Zyl	RSA	20 Jul 85	186/75	1rA	Herc	Monaco	28 Jul
3	47.98			Bershawn Jackson	USA	8 May 83	173/68	2rA	Herc	Monaco	28 Jul
4	48.05			Isa Phillips	JAM	22 Apr 84	193/84	1	NC	Kingston	27 Jun
5	48.09			Javier Culson	PUR	25 Jul 84	198/79	2	WC	Berlin	18 Aug
6	48.13			Danny McFarlane	JAM	14 Feb 72	185/81	3rA	Herc	Monaco	28 Jul
7	48.18			Johnny Dutch	USA	20 Jan 89	180/82	2	NC	Eugene OR	28 Jun
8	48.26	NR AJR		Jehue Gordon	TRI	15 Nov 91	190/75	4	WC	Berlin	18 Aug
9	48.27			David Greene	GBR	11 Apr 86	183/75	2s2	WC	Berlin	16 Aug
10	48.30			Angelo Taylor	USA	29 Dec 78	188/77	3	NC	Eugene OR	28 Jun
11	48.34			Félix Sánchez	DOM	30 Aug 77	178/73	2s1	WC	Berlin	16 Aug
12	48.42			Periklís Iakovákis	GRE	24 Mar 79	185/67	5	WC	Berlin	18 Aug
13	48.47			Jeshua Anderson	USA	22 Jun 89	187/84	1	NCAA	Fayetteville AR	12 Jun
14	48.53			Michael Tinsley	USA	21 Apr 84	183/80	4	NC	Eugene OR	28 Jun
15	48.67			Mahau Suguimati	BRA	13 Nov 84	194/77	1	Kokutai	Niigata	3 Oct
16	48.68			Tristan Thomas	AUS	23 May 86	184/70	2	GP	Osaka	9 May
17	48.77			Kenji Narisako	JPN	25 Jul 84	185/74	3	GP	Osaka	9 May
18	48.86			Justin Gaymon	USA	13 Dec 86	175/70	2	SEC	Gainesville FL	17 May
19	48.87			Omar Cisneros	CUB	19 Nov 89	186/80	1	Barrientos	La Habana	30 May
20	49.04			Naohiro Kawakita	JPN	10 Jul 80	181/75	3	Kokutai	Niigata	3 Oct