# Athletics at the 2016 Summer Olympics – Women's 400 metres

The women's 400 metres event at the 2016 Summer Olympics took place between 13–15 August at the Olympic Stadium.

## Summary

Shaunae Miller of Bahamas was the world leading runner for 2016, followed by 2015 World Champion Allyson Felix. 2012 Olympic champion Sanya Richards-Ross had failed to make the American team due to a hamstring injury during the American trials.
In qualifying, 2 athletes ran under 51 seconds, American Phyllis Francis and Oluwakemi Adekoya, who ran a Bahraini record. Another Nigerian born Bahraini, 18-year-old Salwa Eid Naser, won her heat in a personal best.
In the final, Natasha Hastings made up most of the stagger on one of the favorites, Shaunae Miller and held the lead to the halfway point. Miller made up the stagger on Stephenie Ann McPherson in lane 8 to her outside. Starting about 150 metres into the race, Miller accelerated, passing Hastings before the halfway point in the far turn. In lane 4, Allyson Felix ran an even pace which saw her separate from the athletes inside of her and catching Shericka Jackson late in the second turn. Coming off the turn, Miller held a clear 2 metre advantage over Hastings, with Felix gaining on Hastings and Jackson more than a metre behind Felix. Hastings was passed by Felix who continued to gain on Miller. In the last few metres as Felix gained on her, Miller started to lean forward trying to get to the finish line. As Felix looked to pass her in the final step, Miller made a last desperate headlong dive across the line. The photo finish revealed her shoulders had crossed the line seven hundredths of a second ahead of Felix. Jamaican Shericka Jackson finished 3 metres back for bronze.
Felix's silver became her seventh Olympic medal. She would later earn two more Olympic gold medals as part of the winning 4x100 meters and 4x400 meters teams, tying her with Merlene Ottey as the most decorated woman in track and field history, with nine Olympic medals.

## Records

Prior to this competition, the existing global and area records were as follows:
| World record | Marita Koch (GDR) | 47.60 s | Canberra, Australia | 6 October 1985 |
| Olympic record | Marie-José Pérec (FRA) | 48.25 s | Atlanta, Georgia, United States | 29 July 1996 |
| World Leading | Allyson Felix (USA) | 49.68 s | Eugene, Oregon, United States | 3 July 2016 |
| Area |
| Area | Time (s) | Athlete | Nation |
| Africa (records) | 49.10 | Falilat Ogunkoya | Nigeria |
| Asia (records) | 49.81 | Ma Yuqin | China |
| Europe (records) | 47.60 WR | Marita Koch | East Germany |
| North, Central America and Caribbean (records) | 48.70 | Sanya Richards | United States |
| Oceania (records) | 48.63 | Cathy Freeman | Australia |
| South America (records) | 49.64 | Ximena Restrepo | Colombia |

## Schedule

All times are Brasilia Time (UTC-3)
| Date | Time | Round |
| Saturday, 13 August 2016 | 11:00 | Round 1 |
| Sunday, 14 August 2016 | 20:35 | Semifinals |
| Monday, 15 August 2016 | 22:45 | Finals |

## Results
### Heats

Qualification rule: First 2 in each heat (Q) and the next 8 fastest (q) advance to the Semifinals

#### Heat 1

| Rank | Athlete | Nation | Time | Notes |
| 1 | Stephenie Ann McPherson | Jamaica | 51.36 | Q |
| 2 | Patience Okon George | Nigeria | 51.83 | Q |
| 3 | Anneliese Rubie | Australia | 51.92 | q, SB |
| 4 | Yuliya Olishevska | Ukraine | 52.45 | |
| 5 | Djénébou Danté | Mali | 52.85 | |
| 6 | Nirmala Sheoran | India | 53.03 | |
| 7 | Gunta Latiševa-Čudare | Latvia | 53.08 | SB |

#### Heat 2

| Rank | Athlete | Nation | Time | Notes |
| 1 | Allyson Felix | United States | 51.24 | Q |
| 2 | Olha Zemlyak | Ukraine | 51.40 | Q |
| 3 | Tamara Salaški | Serbia | 52.70 | |
| 4 | Tsholofelo Thipe | South Africa | 52.80 | |
| 5 | Iveta Putálová | Slovakia | 52.82 | SB |
| 6 | Aauri Bokesa | Spain | 53.51 | |
| 7 | Seren Bundy-Davies | Great Britain | 53.63 | |

#### Heat 3

| Rank | Athlete | Nation | Time | Notes |
| 1 | Phyllis Francis | United States | 50.58 | Q |
| 2 | Kemi Adekoya | Bahrain | 50.72 | Q |
| 3 | Margaret Bamgbose | Nigeria | 51.43 | q |
| 4 | Patrycja Wyciszkiewicz | Poland | 52.02 | q, SB |
| 5 | Alicia Brown | Canada | 52.27 | |
| 6 | Jailma de Lima | Brazil | 52.65 | |
| 7 | Justine Palframan | South Africa | 53.96 | |

#### Heat 4

| Rank | Athlete | Nation | Time | Notes |
| 1 | Natasha Hastings | United States | 51.31 | Q |
| 2 | Christine Ohuruogu | Great Britain | 51.40 | Q |
| 3 | Maria Benedicta Chigbolu | Italy | 52.06 | |
| 4 | Lydia Jele | Botswana | 52.24 | |
| 5 | Olha Bibik | Ukraine | 52.33 | |
| 6 | Kendra Clarke | Canada | 53.61 | |
| 7 | Vijona Kryeziu | Kosovo | 54.30 | |

#### Heat 5

| Rank | Athlete | Nation | Time | Notes |
| 1 | Shaunae Miller | Bahamas | 51.16 | Q |
| 2 | Morgan Mitchell | Australia | 51.30 | Q |
| 3 | Ruth Spelmeyer | Germany | 51.43 | q, PB |
| 4 | Emily Diamond | Great Britain | 51.76 | q |
| 5 | Kanika Beckles | Grenada | 52.41 | SB |
| 6 | Bianca Răzor | Romania | 52.42 | SB |
| 7 | Kineke Alexander | Saint Vincent and the Grenadines | 52.45 | |

#### Heat 6

| Rank | Athlete | Nation | Time | Notes |
| 1 | Salwa Eid Naser | Bahrain | 51.06 | Q, PB |
| 2 | Libania Grenot | Italy | 51.17 | Q |
| 3 | Floria Gueï | France | 51.29 | q |
| 4 | Cátia Azevedo | Portugal | 52.38 | |
| 5 | Mariam Kromah | Liberia | 52.79 | |
| 6 | Nguyễn Thị Huyền | Vietnam | 52.97 | |
| 7 | Irini Vasiliou | Greece | 54.37 | |
| 8 | Maryan Nuh Muse | Somalia | 1:10.14 | |

#### Heat 7

| Rank | Athlete | Nation | Time | Notes |
| 1 | Shericka Jackson | Jamaica | 51.73 | Q |
| 2 | Kabange Mupopo | Zambia | 51.76 | Q |
| 3 | Justyna Święty | Poland | 51.82 | q |
| 4 | Christine Botlogetswe | Botswana | 52.37 | |
| 5 | Omolara Omotosho | Nigeria | 53.22 | |
| 6 | Elina Mikhina | Kazakhstan | 53.83 | |
| 7 | Dalal Mesfer Al-Harith | Qatar | 1:07.12 | |

#### Heat 8

| Rank | Athlete | Nation | Time | Notes |
| 1 | Christine Day | Jamaica | 51.54 | Q |
| 2 | Carline Muir | Canada | 51.57 | Q |
| 3 | Małgorzata Hołub | Poland | 51.80 | q |
| 4 | Geisa Coutinho | Brazil | 52.05 | |
| 5 | Aliyah Abrams | Guyana | 52.79 | |
| 6 | Mariama Mamoudou Ittatou | Niger | 54.32 | |
| DQ (7) | Anastassya Kudinova | Kazakhstan | 56.03 | DQ (Doping) |

### Semifinals
#### Semifinal 1

| Rank | Lane | Athlete | Nation | Reaction | Time | Notes |
| 1 | 6 | Phyllis Francis | United States | 0.189 | 50.31 | Q |
| 2 | 5 | Stephenie Ann McPherson | Jamaica | 0.158 | 50.69 | Q |
| 3 | 4 | Olha Zemlyak | Ukraine | 0.189 | 50.75 | q, PB |
| 4 | 3 | Kemi Adekoya | Bahrain | 0.161 | 50.88 | |
| 5 | 7 | Christine Ohuruogu | Great Britain | 0.145 | 51.22 | |
| 6 | 2 | Ruth Spelmeyer | Germany | 0.155 | 51.61 | |
| 7 | 8 | Margaret Bamgbose | Nigeria | 0.212 | 51.92 | |
| 8 | 1 | Patrycja Wyciszkiewicz | Poland | 0.174 | 52.51 | |

#### Semifinal 2

| Rank | Lane | Athlete | Nation | Reaction | Time | Notes |
| 1 | 6 | Shericka Jackson | Jamaica | 0.184 | 49.83 | Q, PB |
| 2 | 5 | Natasha Hastings | United States | 0.188 | 49.90 | Q, SB |
| 3 | 3 | Salwa Eid Naser | Bahrain | 0.139 | 50.88 | PB |
| 4 | 8 | Floria Gueï | France | 0.178 | 51.08 | |
| 5 | 7 | Carline Muir | Canada | 0.226 | 51.11 | |
| 6 | 1 | Emily Diamond | Great Britain | 0.178 | 51.49 | |
| 7 | 2 | Małgorzata Hołub | Poland | 0.136 | 51.93 | |
| 8 | 4 | Morgan Mitchell | Australia | 0.136 | 52.68 | |

#### Semifinal 3

| Rank | Lane | Athlete | Nation | Reaction | Time | Notes |
| 1 | 3 | Allyson Felix | United States | 0.174 | 49.67 | Q, SB |
| 2 | 4 | Shaunae Miller | Bahamas | 0.167 | 49.91 | Q |
| 3 | 6 | Libania Grenot | Italy | 0.156 | 50.60 | q |
| 4 | 5 | Christine Day | Jamaica | 0.186 | 51.53 | |
| 5 | 1 | Justyna Święty | Poland | 0.171 | 51.62 | |
| 6 | 2 | Anneliese Rubie | Australia | 0.172 | 51.96 | |
| 7 | 8 | Kabange Mupopo | Zambia | 0.155 | 52.04 | |
| 8 | 7 | Patience Okon George | Nigeria | 0.161 | 52.52 | |

### Final

| Rank | Lane | Athlete | Nation | Reaction | Time | Notes |
| | 7 | Shaunae Miller | Bahamas | 0.155 | 49.44 | PB |
| | 4 | Allyson Felix | United States | 0.177 | 49.51 | SB |
| | 5 | Shericka Jackson | Jamaica | 0.176 | 49.85 | |
| 4 | 6 | Natasha Hastings | United States | 0.161 | 50.34 | |
| 5 | 3 | Phyllis Francis | United States | 0.219 | 50.41 | |
| 6 | 8 | Stephenie Ann McPherson | Jamaica | 0.133 | 50.97 | |
| 7 | 2 | Libania Grenot | Italy | 0.149 | 51.25 | |
| DSQ | 1 | Olha Zemlyak | Ukraine | 0.183 | 51.24 | |