| Order / Lane | ATHLETE | COUNTRY | PB | SB 2002 | 
|---|---|---|---|---|
| Bahamas Junior |  BAH | 40.34 | 40.49 | |
| 1 | Greece Junior |  GRE | 40.72 | |
| 2 | Chile Junior |  CHI | 40.38 | 40.38 | 
| 3 | Trinidad and Tobago Junior |  TTO | 39.95 | 39.95 | 
| 4 | Jamaica Junior |  JAM | 39.70 | 40.19 | 
| 5 | France Junior |  FRA | 39.33 | |
| 6 | Italy Junior |  ITA | 39.61 | 40.27 | 
| 8 | Australia Junior |  AUS | 39.62 | 40.26 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2002 | 
|---|---|---|---|---|
| South Africa Junior |  RSA | 40.26 | ||
| 2 | Brazil Junior |  BRA | 40.17 | |
| 3 | Poland Junior |  POL | 39.61 | 40.23 | 
| 4 | New Zealand Junior |  NZL | 40.11 | |
| 5 | United States Junior |  USA | 39.00 | 40.77 | 
| 6 | Germany Junior |  GER | 39.25 | 40.38 | 
| 7 | Japan Junior |  JPN | 39.47 | |
| 8 | Singapore U20 |  SGP | 41.91 |