2017 World Youth Championships in Athletics – Boys' 400 metres
| Boy's 400 metres at the World U18 Championships | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Venue | Moi International Sports Centre | |||||||||
| Dates | 12–14 July 2017 | |||||||||
| Winning time | 46.59 | |||||||||
| Medalists | ||||||||||
| ||||||||||
| 2017 World Youth Championships in Athletics | ||
|---|---|---|
 | ||
| Track events | ||
| 100 m | boys | girls |
| 200 m | boys | girls |
| 400 m | girls | |
| 800 m | boys | girls |
| 1500 m | boys | girls |
| 3000 m | boys | girls |
| 5000 m | boys | girls |
| 100 m hurdles | girls | |
| 110 m hurdles | boys | |
| 400 m hurdles | boys | girls |
| 2000 m s'chase | boys | girls |
| Medley relay | boys | girls |
| 5000 m walk | girls | |
| 10,000 m walk | boys | |
| Field events | ||
| Long jump | boys | girls |
| Triple jump | boys | girls |
| High jump | boys | girls |
| Pole vault | boys | girls |
| Shot put | boys | girls |
| Discus throw | boys | girls |
| Javelin throw | boys | girls |
| Hammer throw | boys | girls |
| Combined events | ||
| Heptathlon | girls | |
| Decathlon | boys | |
The Boys' 400 metres at the 2017 World Youth Championships in Athletics was held on 12–14 July.
Records
Prior to the competition, the following records were as follows.
| World Youth Best |  Obea Moore (USA)
|
45.14 | Santiago de Chile, Chile | 2 September 1995 |
| Championship Record |  Kirani James (GRN)
|
45.24 | Bressanone, Italy | 10 July 2009 |
| World Youth Leading | Tyrese Cooper (USA)
|
45.38 | Albuquerque, New Mexico, United States | 3 June 2017 |
Heats
Qualification rule: first 4 of each heat (Q) and the next 4 fastest qualified.[1]
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 1 | Anthony Cox |  Jamaica |
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| 1 | 2 | Thiran Kalavitigoda Pathirannahalage |  Sri Lanka |
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| 1 | 3 | Gregor Grahovac |  Slovenia |
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| 1 | 4 | Correy Sherrod |  Bahamas |
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| 1 | 5 | Xu Bo |  China |
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| 1 | 6 | Patrice Remanoro |  Madagascar |
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| 1 | 7 | Ali Soleymani |  Iran |
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| 1 | 8 | Mohammad Jahir Rayhan |  Bangladesh |
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| 2 | 2 | Daniel Williams |  Guyana |
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| 2 | 3 | Elvin Josué Canales | .svg.png){kind=small} Honduras |
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| 2 | 4 | Thiruben Thana Rajan |  Singapore |
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| 2 | 5 | Melkamu Assefa |  Ethiopia |
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| 2 | 6 | Eric Layeng |  Uganda |
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| 2 | 7 | José Álvarez |  Venezuela |
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| 2 | 8 | Antonio Grant |  Panama |
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| 3 | 1 | Reuben Nichols |  Saint Lucia |
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| 3 | 2 | Musa Isah |  Bahrain |
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| 3 | 3 | Manish Manish |  India |
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| 3 | 4 | Kelvin Sawe Tauta |  Kenya |
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| 3 | 5 | Elián Larregina |  Argentina |
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| 3 | 6 | Mohamed Naail |  Maldives |
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| 3 | 7 | Yaroslav Demchenko |  Ukraine |
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| 3 | 8 | Nsikak Francis Okon |  Nigeria |
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| 4 | 1 | Yaroslav Holub | Ukraine |
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| 4 | 2 | Deng Hantao | China |
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| 4 | 3 | Mohammad Reza Dehghani | Iran |
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| 4 | 4 | Alexandru Vlad |  Romania |
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| 4 | 5 | Antonio Watson | Jamaica |
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| 4 | 6 | David Sanayek | Kenya |
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| 4 | 7 | Ivan Danny Geldenhuis |  Namibia |
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| 4 | 8 | Akshay Nain | India |
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| 5 | 2 | Tyrell Simms | Bahamas |
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| 5 | 3 | Emmanuel Goni | Uganda |
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| 5 | 4 | Bruno Benedito da Silva |  Brazil |
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| 5 | 5 | Diego Camacho | Venezuela |
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| 5 | 6 | Kennedy Luchembe |  Zambia |
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| 5 | 7 | Bernard Olesitse |  Botswana |
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| 5 | 8 | Colby Jennings |  Turks and Caicos Islands |
Semifinals
Semifinal 1
| Rank | Name | Nationality | Reaction | Time | Notes |
|---|---|---|---|---|---|
| 1 | Colby Jennings | Turks and Caicos Islands |
0.224 | 47.36 | Q, PB |
| 2 | Melkamu Assefa | Ethiopia |
0.214 | 47.43 | Q |
| 3 | Kelvin Sawe Tauta | Kenya |
0.370 | 47.55 | |
| 4 | Elvin Josué Canales | Honduras |
0.243 | 48.21 | |
| 5 | Thiruben Thana Rajan | Singapore |
0.171 | 48.40 | |
| 6 | Musa Isah | Bahrain |
0.187 | 48.43 | |
| 7 | Xu Bo | China |
0.226 | 48.90 | |
| 8 | Bernard Olesitse | Botswana |
0.161 | 50.54 |
Semifinal 2
| Rank | Name | Nationality | Reaction | Time | Notes |
|---|---|---|---|---|---|
| 1 | Anthony Cox | Jamaica |
0.266 | 46.86 | Q |
| 2 | Ivan Danny Geldenhuys | Namibia |
0.181 | 47.24 | Q, PB |
| 3 | Daniel Williams | Guyana |
0.186 | 47.46 | q |
| 4 | David Sanayek | Kenya |
0.199 | 47.66 | |
| 5 | Mohammad Jahir Rayhan | Bangladesh |
0.198 | 48.22 | |
| 6 | José Álvarez | Venezuela |
0.160 | 48.79 | |
| 7 | Deng Hantao | China |
0.185 | 49.12 | |
| 8 | Tyrell Simms | Bahamas |
0.167 | 49.38 |
Semifinal 3
| Rank | Name | Nationality | Reaction | Time | Notes |
|---|---|---|---|---|---|
| 1 | Bruno Benedito da Silva | Brazil |
0.215 | 46.87 | Q, PB |
| 2 | Antonio Watson | Jamaica |
0.000 | 47.05 | Q, PB |
| 3 | Gregor Grahovac | Slovenia |
0.183 | 47.34 | q, PB |
| 4 | Yaroslav Demchenko | Ukraine |
0.178 | 47.96 | PB |
| 5 | Reuben Nichols | Saint Lucia |
0.215 | 48.01 | PB |
| 6 | Correy Sherrod | Bahamas |
0.211 | 48.56 | |
| 7 | Thiran Kalavitigoda Pathirannahalage | Sri Lanka |
0.188 | 48.89 | |
| – | Antonio Grant | Panama |
— | — | DQ |
Final
| Rank | Name | Nationality | Reaction | Time | Notes |
|---|---|---|---|---|---|
 |
Antonio Watson | Jamaica |
0.174 | 46.59 | PB |
 |
Daniel Williams | Guyana |
0.200 | 46.72 | PB |
 |
Colby Jennings | Turks and Caicos Islands |
0.213 | 46.77 | PB |
| 4 | Anthony Cox | Jamaica |
0.210 | 46.77 | |
| 5 | Melkamu Assefa | Ethiopia |
0.249 | 47.05 | |
| 6 | Bruno Benedito da Silva | Brazil |
0.231 | 47.15 | |
| 7 | Ivan Danny Geldenhuys | Namibia |
0.192 | 47.17 | PB |
| 8 | Gregor Grahovac | Slovenia |
0.157 | 48.88 |