# 2018 IAAF World Indoor Championships – Men's 400 metres

The men's 400 metres at the 2018 IAAF World Indoor Championships took place on 2 and 3 March 2018.

## Summary

For the first time ever in a World Championship, every runner in a single preliminary heat was disqualified. It was the third heat, where first returning silver medalist Abdalelah Haroun false started himself out of the heat. #5 runner of all time Bralon Taplin won the heat, but he and the other three remaining runners Austris Karpinskis, Alonzo Russell and Steven Gayle were then disqualified for lane violations.
2012 Champion Nery Brenes also found himself disqualified after winning the fifth heat. With two place qualifiers missing, it opened the door for Juander Santos and Mikhail Litvin to take the extra time qualification positions in the semi-final round.
In the final, Óscar Husillos from lane 6 was first to the break line and took the lead with a lap to go, holding the lead to cross the finish line first in a time of 44.92. However, Husillos and Luguelín Santos were disqualified for lane violations, giving Pavel Maslák his third consecutive championship, Michael Cherry the silver, and Deon Lendore the bronze.

## Results
### Heats

The heats were started on 2 March at 11:20.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 6 | Luka Janežič | Slovenia | 46.45 | Q |
| 2 | 6 | 5 | Óscar Husillos | Spain | 46.51 | Q |
| 3 | 1 | 5 | Jakub Krzewina | Poland | 46.57 | Q |
| 4 | 1 | 6 | Deon Lendore | Trinidad and Tobago | 46.68 | Q |
| 5 | 5 | 6 | Aldrich Bailey | United States | 46.77 | Q |
| 6 | 6 | 6 | Pavel Maslák | Czech Republic | 46.80 | Q |
| 7 | 5 | 5 | Lee Thompson | Great Britain | 46.81 | Q |
| 8 | 6 | 3 | Luguelín Santos | Dominican Republic | 46.83 | q |
| 9 | 6 | 4 | Yousef Karam | Kuwait | 46.86 | q |
| 10 | 2 | 5 | Javon Francis | Jamaica | 46.87 | Q |
| 11 | 2 | 4 | Chidi Okezie | Nigeria | 46.91 | q |
| 12 | 2 | 3 | Asa Guevara | Trinidad and Tobago | 46.92 | q |
| 13 | 1 | 3 | Lucas Búa | Spain | 46.96 | q |
| 14 | 5 | 4 | Patrik Šorm | Czech Republic | 46.99 | q |
| 15 | 4 | 5 | Michael Cherry | United States | 46.99 | Q |
| 16 | 1 | 4 | Juander Santos | Dominican Republic | 47.02 | q |
| 17 | 4 | 6 | Rafał Omelko | Poland | 47.13 | Q |
| 18 | 4 | 3 | Mikhail Litvin | Kazakhstan | 47.16 | q |
| 19 | 4 | 4 | Vitalii Butrym | Ukraine | 47.45 | |
| 20 | 1 | 2 | Michael Anthony Rasmijn | Aruba | 49.20 | NR |
| 21 | 6 | 1 | Davron Atabaev | Tajikistan | 49.20 | SB |
| 22 | 2 | 1 | Kelvin Delvin Ramírez | Nicaragua | 49.88 | SB |
| 23 | 2 | 2 | Tikie Terry Mael | Vanuatu | 49.92 | PB |
| 24 | 4 | 2 | Mohamed Naail | Maldives | 49.98 | NR |
| 25 | 6 | 2 | Narek Ghukasyan | Armenia | 51.02 | PB |
| | 3 | 5 | Abdalelah Haroun | Qatar | DQ | 162.8 |
| | 3 | 6 | Bralon Taplin | Grenada | DQ | 163.3(a) |
| | 3 | 2 | Austris Karpinskis | Latvia | DQ | 163.3(a) |
| | 3 | 4 | Alonzo Russell | Bahamas | DQ | 163.3(a) |
| | 3 | 3 | Steven Gayle | Jamaica | DQ | 163.3(a) |
| | 5 | 3 | Nery Brenes | Costa Rica | DQ | 163.3(a) |
| | 5 | 2 | Mazen Alyasen | Saudi Arabia | DNS | |

### Semifinal

The semifinals were started on 2 March at 21:06.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 5 | Óscar Husillos | Spain | 45.69 | Q |
| 2 | 2 | 6 | Michael Cherry | United States | 45.73 | Q |
| 3 | 1 | 3 | Luguelín Santos | Dominican Republic | 46.31 | Q, SB |
| 4 | 3 | 4 | Pavel Maslák | Czech Republic | 46.32 | Q |
| 5 | 1 | 6 | Aldrich Bailey | United States | 46.33 | Q |
| 6 | 3 | 6 | Deon Lendore | Trinidad and Tobago | 46.33 | Q |
| 7 | 3 | 5 | Luka Janežič | Slovenia | 46.37 | |
| 8 | 2 | 4 | Rafał Omelko | Poland | 46.39 | |
| 9 | 1 | 5 | Jakub Krzewina | Poland | 46.69 | |
| 10 | 1 | 4 | Javon Francis | Jamaica | 46.73 | |
| 11 | 2 | 2 | Juander Santos | Dominican Republic | 46.83 | PB |
| 12 | 2 | 1 | Asa Guevara | Trinidad and Tobago | 46.91 | |
| 13 | 1 | 2 | Patrik Šorm | Czech Republic | 47.04 | |
| 14 | 2 | 3 | Lee Thompson | Great Britain | 47.14 | |
| 15 | 1 | 1 | Lucas Búa | Spain | 47.14 | |
| 16 | 3 | 1 | Mikhail Litvin | Kazakhstan | 47.94 | |
| 17 | 3 | 2 | Chidi Okezie | Nigeria | 48.53 | |
| | 3 | 3 | Yousef Karam | Kuwait | DNF | |

### Final

The final was started on 3 March at 20:20.
| Rank | Name | Nationality | Time | Notes |
| | Pavel Maslák | Czech Republic | 45.47 | SB |
| | Michael Cherry | United States | 45.84 | |
| | Deon Lendore | Trinidad and Tobago | 46.37 | |
| 4 | Aldrich Bailey | United States | 46.44 | |
| | Óscar Husillos | Spain | DQ | 163.3(b) |
| | Luguelín Santos | Dominican Republic | DQ | 163.3(b) |