| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 792 | Kirani JAMES |
GRN |
43.78 Q SB | |
| 2 | 2 | 2 | 1378 | Muzala SAMUKONGA |
ZAM |
43.81 Q NR | |
| 3 | 1 | 1 | 1309 | Quincy HALL |
USA |
43.95 Q | |
| 4 | 1 | 3 | 705 | Matthew HUDSON-SMITH |
GBR |
44.07 Q | |
| 5 | 2 | 3 | 1337 | Michael NORMAN |
USA |
44.26 Q | |
| 6 | 3 | 2 | 1289 | Christopher BAILEY |
USA |
44.31 q PB | |
| 7 | 2 | 1 | 1257 | Jereem RICHARDS |
TTO |
44.33 Q | |
| 8 | 3 | 3 | 1082 | Samuel OGAZI |
NGR |
44.41 q PB | |
| 9 | 3 | 1 | 407 | Busang Collen KEBINATSHIPI |
BOT |
44.43 PB | .428 |
| 10 | 4 | 2 | 410 | Bayapo NDORI |
BOT |
44.43 | .429 |
| 11 | 4 | 1 | 697 | Charles DOBSON |
GBR |
44.48 | |
| 12 | 5 | 1 | 1170 | Ammar Ismail YAHIA IBRAHIM |
QAT |
44.64 PB | |
| 13 | 4 | 3 | 910 | Jevaughn POWELL |
JAM |
44.91 | |
| 14 | 5 | 3 | 333 | Reece HOLDER |
AUS |
44.94 | .933 |
| 15 | 6 | 1 | 1203 | Cheikh Tidiane DIOUF |
SEN |
44.94 NR | .940 |
| 16 | 5 | 2 | 870 | Luca SITO |
ITA |
45.01 | |
| 17 | 6 | 2 | 314 | Elián LARREGINA |
ARG |
45.02 | |
| 18 | 6 | 3 | 1184 | Zakithi NENE |
RSA |
45.06 | |
| 19 | 7 | 3 | 414 | Leungo SCOTCH |
BOT |
45.16 | |
| 20 | 7 | 2 | 1187 | Lythe PILLAY |
RSA |
45.24 | |
| 21 | 8 | 3 | 463 | Christopher MORALES-WILLIAMS |
CAN |
45.25 | |
| 22 | 7 | 1 | 1093 | HÃ¥vard Bentdal INGVALDSEN |
NOR |
45.60 | |
| 23 | 8 | 1 | 380 | Alexander DOOM |
BEL |
1:55.10 | |
| 2 | 1213 | Aruna Dharshana SINGHAPURAGE |
SRI |
DQ |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second