| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Italy U20 |
ITA
|
39.75 Q SB | 0.195 |
| 2 | Czech Republic U20 |
CZE
|
39.91 Q SB | 0.194 |
| 3 | Ireland U20 |
IRL
|
40.51 | 0.168 |
| 4 | Hungary U20 |
HUN
|
40.84 SB | 0.158 |
| 5 | Ukraine U20 |
UKR
|
41.09 SB | 0.178 |
| 6 | Qatar U20 |
QAT
|
41.35 | 0.166 |
| Australia U20 |
AUS
|
DNF | 0.166 | |
| Great Britain & NI U20 |
GBR
|
DNF | 0.138 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Germany U20 |
GER
|
39.13 Q WU20L | 0.177 |
| 2 | Jamaica U20 |
JAM
|
39.68 Q | 0.152 |
| 3 | Poland U20 |
POL
|
39.99 SB | 0.151 |
| 4 | Finland U20 |
FIN
|
40.26 SB | 0.178 |
| 5 | Greece U20 |
GRE
|
40.78 | 0.183 |
| South Africa U20 |
RSA
|
DQ | 0.163 | |
| Saudi Arabia U20 |
KSA
|
DNS |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Japan U20 |
JPN
|
39.18 Q SB | 0.144 |
| 2 | United States U20 |
USA
|
39.49 Q SB | 0.141 |
| 3 | Trinidad and Tobago U20 |
TTO
|
39.67 q SB | 0.138 |
| 4 | Spain U20 |
ESP
|
39.99 q SB | 0.153 |
| 5 | Bahamas U20 |
BAH
|
40.85 | 0.263 |
| 6 | Turkey U20 |
TUR
|
40.87 | 0.138 |
| 7 | India U20 |
IND
|
41.11 | 0.170 |