The Boys' 100 metres at the 2009 World Youth Championships in Athletics was held at the Brixen-Bressanone Sport Arena on 8 and 9 July.[1] The event was won by Prezel Hardy of the United States.[2]
Medalists
edit| Gold | Silver | Bronze |
Prezel Hardy United States
|
Aaron Brown Canada
|
Giovanni Galbieri Italy
|
Records
editPrior to the competition, the following records were as follows.
| World Youth Best | Rynell Parson (USA)
|
10.23 | Indianapolis, USA | 21 June 2007 |
| Championship Record |  Darrel Brown (TRI)
|
10.31 | Debrecen, Hungary | 13 July 2001 |
| World Youth Leading | Prezel Hardy (USA)
|
10.34 | Waco, United States | 22 May 2009 |
 Takumi Kuki (JPN)
|
Nara, Japan | 19 June 2009 |
No new records were set during the competition.
Heats
editQualification rule: first 2 of each heat (Q) plus the 4 fastest times (q) qualified.
Semifinals
editQualification rule: first 4 of each heat (Q) qualified.
Heat 1
edit| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 6 | Prezel Hardy |  United States |
10.38 | Q |
| 2 | 5 | Ryota Yamagata | Japan |
10.61 | Q |
| 3 | 4 | Huang Xiang | Canada |
10.62 | Q |
| 4 | 3 | Moriba Morain | Trinidad and Tobago |
10.71 | Q |
| 5 | 7 | Richmond Collins |  South Africa |
10.73 | |
| 6 | 2 | Carlos Rodríguez |  Puerto Rico |
10.84 | |
| 7 | 1 | Mateo Edward |  Panama |
10.88 | |
| – | 8 | Ratu Tabakaucoro |  Fiji |
DNS |
Key: PB = Personal best, SB = Seasonal best
Wind: 1.1 m/s
Heat 2
edit| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 6 | Aaron Brown | Canada |
10.49 | Q |
| 2 | 8 | Jimmy Vicaut |  France |
10.56 | Q |
| 3 | 3 | Giovanni Galbieri | Italy |
10.59 | Q |
| 4 | 5 | Takumi Kuki | Japan |
10.61 | Q |
| 5 | 4 | Tan Juquan |  China |
10.62 | |
| 6 | 7 | Kemar Bailey-Cole |  Jamaica |
10.66 | |
| 7 | 2 | Geno Jones |  Bahamas |
10.72 | |
| 8 | 1 | Jamol James | Trinidad and Tobago |
10.91 |
Key: PB = Personal best, SB = Seasonal best
Wind: 1.3 m/s
Final
edit| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
 |
6 | Prezel Hardy | United States |
10.57 | |
 |
5 | Aaron Brown | Canada |
10.74 | |
 |
7 | Giovanni Galbieri | Italy |
10.79 | |
| 4 | 4 | Ryota Yamagata | Japan |
10.80 | |
| 5 | 8 | Huang Xiang | China |
10.83 | |
| 6 | 1 | Takumi Kuki | Japan |
10.88 | |
| 7 | 3 | Jimmy Vicaut | France |
10.89 | |
| 8 | 2 | Moriba Morain | Trinidad and Tobago |
10.94 |
Key: PB = Personal best, SB = Seasonal best
Wind: −1.2 m/s