| Order / Lane | ATHLETE | COUNTRY | PB | SB 2018 |
|---|---|---|---|---|
| 2 | Germany U20 |
GER
|
43.27 | 44.42 |
| 3 | Great Britain & NI U20 |
GBR
|
43.81 | 44.57 |
| 4 | Australia U20 |
AUS
|
44.86 | |
| 5 | Switzerland U20 |
SUI
|
44.61 | 45.36 |
| 6 | United States U20 |
USA
|
43.29 | |
| 7 | Canada U20 |
CAN
|
44.77 | |
| 8 | PR of China U20 |
CHN
|
44.75 | 45.06 |
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2018 |
|---|---|---|---|---|
| 2 | France U20 |
FRA
|
43.68 | 45.72 |
| 3 | Brazil U20 |
BRA
|
43.98 | |
| 4 | Ireland U20 |
IRL
|
44.15 | 44.15 |
| 5 | Italy U20 |
ITA
|
44.52 | |
| 6 | Austria U20 |
AUT
|
45.71 | 45.77 |
| 7 | Jamaica U20 |
JAM
|
43.40 | 44.73 |
| 8 | Poland U20 |
POL
|
43.79 | 45.11 |