2009 World Championships in Athletics – Men's 400 metres
Introduction The '''men's 400 metres''' at the 2009 World Championships in Athletics was held at the Olympic Stadium on 18, 19 and 21 August.The United States had a strong tradition in the event, with an American topping the Olympic 400 m podium every time since the 1988 Olympics. Similar to the 2007 World Championships, Jeremy Wariner and LaShawn Merritt were the clear favourites. However, on this occasion recent form favoured the Olympic champion Merritt instead of the reigning world champion Wariner. Both Americans were undefeated that season but Merritt held the world-leading time of 44.50 seconds. A gold or silver medallist outside of these two competitors seemed unlikely; Bahamian Chris Brown, Irishman David Gillick, Frenchman Leslie Djhone and the other two runners from the United States (Gil Roberts and Lionel Larry) were seen to be capable of a bronze at best.On the first day, Ramon Miller surprised as the fastest qualifier in the heats, scoring a new personal best of 45 seconds. Tabarie Henry, Djhone and Renny Quow were the next fastest, and African record holder Gary Kikaya was most high-profile casualty of the first round, having been disqualified for a lane infraction.
Medalists '''Gold''''''Silver''''''Bronze'''LaShawn Merritt''''Jeremy Wariner''''Renny Quow''''
Records Prior to the competition, the established records were as follows. '''World record''''''43.18'''Seville, Spain26 August 1999'''Championship record''''''43.18'''Seville, Spain26 August 1999'''World Leading''''''44.50'''Baie-Mahault, France3 July 2009'''African record''''''44.10'''Stuttgart, Germany9 September 2006'''Asian record''''''44.56'''Budapest, Hungary12 August 1988'''North American record''''''43.18'''Seville, Spain26 August 1999'''South American record''''''44.29'''Seville, Spain26 August 1999'''European record''''''44.33'''Rome, Italy3 September 1987'''Oceanian record''''''44.38'''Seoul, South Korea26 September 1988
Qualification standards A timeB time 45.55 45.95
Schedule  Date Time RoundAugust 18, 2009  '''11:05'''   '''Heats'''August 19, 2009  '''18:15'''   '''Semifinals'''August 21, 2009  '''21:20'''   '''Final'''
Results ===Heats===Qualification: First 3 in each heat('''Q''') and the next 3 fastest('''q''') advance to the semifinals.Rank  Heat   Name  Nationality  Time  Notes    5  Ramon Miller     45.00   Q, PB    7  Tabarie Henry    45.14   Q    5  Leslie Djhone     45.20  Q    2  Renny Quow    45.21    Q     4  LaShawn Merritt    45.23    Q   7  Sean Wroe    45.31   Q    4  John Steffensen    45.37    Q    7  Martyn Rooney    45.45    Q    1  Robert Tobin     45.50   Q   10  2  William Collazo    45.52    Q   11 3  Chris Brown    45.53    Q   12 6  Jeremy Wariner    45.54    Q  12  1  David Gillick    45.54     Q  12  3  Michael Bingham    45.54    Q  15  1  Rabah Yousif     45.55    Q, PB  15  7  Erison Hurtault    45.55    q, SB     17 3  Joel Milburn     45.56   Q, SB  17  7  Mohamed Ashour Khouaja     45.56   q, '''NR'''   19  6  Ricardo Chambers     45.57   Q  20  2  Kevin Borlée    45.61     Q 21   1  Lionel Larry    45.64    q   22  2  Marcin Marciniszyn    45.77    SB   23  5  Johan Wissman    45.83    Q  24  4  Matteo Galvan     45.86   Q, PB  25  5  Maksim Dyldin    45.91    26  1  Young Talkmore Nyongani    45.92     27  1  Cédric Van Branteghem    45.94    28  4  Héctor Carrasquillo     46.11     29  2  Arismendy Peguero     46.13      30   6  Teddy Venel     46.16    Q  31  3  Eric Milazar    46.39    32   5  Gil Roberts     46.41    33   7  Saul Weigopwa    46.42    34   3  Isaac Makwala    46.45      35   4  Alvin Harrison    46.67   36   3  Nagmeldin Ali Abubakr     46.48     37   1  Hideyuki Hirose    46.80     38   6  Yuzo Kanemaru    46.83     39   7  Rondell Bartholomew     46.85    40   3  Andrés Silva     46.86    41   2  Mathieu Gnanligo    47.00   SB 42   6  Yousef Ahmed Masrahi     47.03    43   5  Mark Kiprotich Muttai     47.04  44   2  Nelson Stone     47.13    45   6  Pieter Smith     48.14  	  46  5  Naiel d'Almeida     49.47    47   7  Moumouni Kimba    50.93  PB  48   3  Zaw Win Thet     51.41   PB     2  Michael Mathieu         DSQ    4  Gary Kikaya         DSQ   4  Yannick Fonsat         DNS    5  James Godday         DNS    6  Nery Brenes       DNS'''Key''':  NR = National record, PB = Personal best, Q = qualification by place in heat, q = qualification by overall place, SB = Seasonal best===Semifinals===First 2 in each semifinal(Q) and the next 2 fastest(q) advance to the final.Rank  Heat   Name  Nationality  Time  Notes    2  LaShawn Merritt     44.37   Q, '''WL'''    2  Renny Quow    44.53   Q, PB    1  Jeremy Wariner     44.69  Q    1  Michael Bingham     44.74  Q, PB    1  Leslie Djhone     44.80   q, SB    1  David Gillick    44.88    q    2  William Collazo     44.93       3  Chris Brown     44.95  Q     3  Tabarie Henry     44.97Q   10   1  Ramon Miller     44.99    PB  11   3  Ricardo Chambers     45.13   SB 12   3  Kevin Borlée     45.28   SB 13    2  Sean Wroe     45.32    14    3  John Steffensen     45.50    15   2  Erison Hurtault     45.59    16    2  Rabah Yousif     45.63   17    3  Lionel Larry     45.85    18   3  Robert Tobin     45.90    19    2  Martyn Rooney     45.98      20   1  Joel Milburn     46.06    21    2  Teddy Venel     46.30    22   1  Mohamed Ashour Khouaja     46.43      23   3  Matteo Galvan    46.87       1  Johan Wissman        DNS===Final===Rank   Name  Nationality  Time  Notes   LaShawn Merritt     44.06  '''WL'''   Jeremy Wariner     44.60  SB   Renny Quow    45.02  4  Tabarie Henry    45.42  5  Chris Brown    45.47   6  David Gillick    45.53   7  Michael Bingham    45.56   8  Leslie Djhone    45.90
References ;General* 400 metres results. IAAF. Retrieved on 2009-08-18.;Specific