| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 2060 | Steven GARDINER |  BAH | 44.65 Q | 0.197 | 
| 2 | 2589 | Kentaro SATO |  JPN | 44.77 Q NR | 0.172 | 
| 3 | 2431 | Attila MOLNÁR |  HUN | 44.84 Q NR | 0.172 | 
| 4 | 2833 | Zakithi NENE |  RSA | 44.88 q | 0.145 | 
| 5 | 2646 | Michael JOSEPH |  LCA | 45.04 q | 0.153 | 
| 6 | 2859 | Aruna Dharshana SINGHAPURAGE |  SRI | 45.70 | 0.214 | 
| 7 | 2625 | Boniface Ontuga MWERESA |  KEN | 45.91 | 0.190 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 11.10 |  Zakithi NENE |  RSA | 
| 200 m | 21.29 |  Steven GARDINER |  BAH | 
| 300 m | 32.34 |  Steven GARDINER |  BAH | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 2842 | Wayde VAN NIEKERK |  RSA | 44.57 Q | 0.185 | 
| 2 | 2349 | Matthew HUDSON-SMITH |  GBR | 44.69 Q SB | 0.177 | 
| 3 | 2699 | Liemarvin BONEVACIA |  NED | 44.78 Q SB | 0.186 | 
| 4 | 2097 | Busang Collen KEBINATSHIPI |  BOT | 44.80 q PB | 0.155 | 
| 5 | 2019 | Elián LARREGINA |  ARG | 45.42 | 0.181 | 
| 6 | 2064 | Alonzo RUSSELL |  BAH | 46.95 | 0.188 | 
| 2186 | Anthony José ZAMBRANO |  COL | DQ | 0.223 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 10.92 |  Busang Collen KEBINATSHIPI |  BOT | 
| 200 m | 21.26 |  Matthew HUDSON-SMITH |  GBR | 
| 300 m | 32.36 |  Matthew HUDSON-SMITH |  GBR | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 2731 | Håvard Bentdal INGVALDSEN |  NOR | 44.39 Q NR | 0.218 | 
| 2 | 3018 | Vernon NORWOOD |  USA | 44.87 Q | 0.194 | 
| 3 | 2919 | Jereem RICHARDS |  TTO | 45.15 Q | 0.153 | 
| 4 | 2073 | Dylan BORLÉE |  BEL | 45.24 q | 0.160 | 
| 5 | 2956 | Oleksandr POHORILKO |  UKR | 45.37 | 0.233 | 
| 6 | 2798 | João COELHO |  POR | 45.38 | 0.273 | 
| 7 | 2068 | Jonathan JONES |  BAR | 46.03 | 0.156 | 
| 2878 | Ricky PETRUCCIANI |  SUI | DNS | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 11.25 |  Dylan BORLÉE |  BEL | 
| 200 m | 21.44 |  Dylan BORLÉE |  BEL | 
| 300 m | 32.39 |  Håvard Bentdal INGVALDSEN |  NOR | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 2413 | Kirani JAMES |  GRN | 44.91 Q | 0.166 | 
| 2 | 2588 | Fuga SATO |  JPN | 44.97 Q PB | 0.167 | 
| 3 | 2529 | Sean BAILEY |  JAM | 44.98 Q | 0.183 | 
| 4 | 2511 | Davide RE |  ITA | 45.07 q SB | 0.153 | 
| 5 | 2101 | Leungo SCOTCH |  BOT | 45.20 q | 0.169 | 
| 6 | 2722 | Dubem NWACHUKWU |  NGR | 45.60 | 0.190 | 
| 7 | 2216 | Gustav Lundholm NIELSEN |  DEN | 45.66 PB | 0.176 | 
| 2889 | Carl BENGTSTRÖM |  SWE | DQ | 0.191 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 11.02 |  Dubem NWACHUKWU |  NGR | 
| 200 m | 21.46 |  Leungo SCOTCH |  BOT | 
| 300 m | 32.88 |  Leungo SCOTCH |  BOT | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 2558 | Antonio WATSON |  JAM | 44.77 Q | 0.169 | 
| 2 | 2989 | Quincy HALL |  USA | 44.86 Q | 0.181 | 
| 3 | 2582 | Yuki Joseph NAKAJIMA |  JPN | 45.15 Q | 0.181 | 
| 4 | 2834 | Lythe PILLAY |  RSA | 45.58 | 0.161 | 
| 5 | 2881 | Lionel SPITZ |  SUI | 45.69 | 0.180 | 
| 6 | 2793 | Karol ZALEWSKI |  POL | 46.53 | 0.168 | 
| 7 | 2477 | Christopher O'DONNELL |  IRL | 46.76 | 0.159 | 
| 2067 | Desean BOYCE |  BAR | DNF | 0.168 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 11.14 |  Desean BOYCE |  BAR | 
| 200 m | 21.56 |  Antonio WATSON |  JAM | 
| 300 m | 32.77 |  Antonio WATSON |  JAM | 
| POS | BIB | ATHLETE | COUNTRY | MARK | ms* | Reaction Time | 
|---|---|---|---|---|---|---|
| 1 | 2099 | Bayapo NDORI |  BOT | 44.72 Q | 0.155 | |
| 2 | 2079 | Alexander DOOM |  BEL | 44.92 Q PB | 0.171 | |
| 3 | 2530 | Zandrion BARNES |  JAM | 45.05 Q | 0.186 | |
| 4 | 2389 | Manuel SANDERS |  GER | 45.34 | .339 | 0.187 | 
| 4 | 2107 | Lucas CARVALHO |  BRA | 45.34 | .339 | 0.175 | 
| 6 | 2207 | Matěj KRSEK |  CZE | 45.99 | 0.147 | |
| 7 | 2982 | Bryce DEADMON |  USA | 46.20 | 0.170 | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 100 m | 11.05 |  Bayapo NDORI |  BOT | 
| 200 m | 21.19 |  Bayapo NDORI |  BOT | 
| 300 m | 32.32 |  Bayapo NDORI |  BOT |