| POS | BIB | ATHLETE | COUNTRY | MARK | ms* | Reaction Time | 
|---|---|---|---|---|---|---|
| 1 | 827 | Adam GEMILI |  GBR | 20.03 Q SB | 0.150 | |
| 2 | 1775 | Ramil GULIYEV |  TUR | 20.16 Q | 0.168 | |
| 3 | 397 | Aaron BROWN |  CAN | 20.20 q | 0.162 | |
| 4 | 1751 | Jereem RICHARDS |  TTO | 20.28 | 0.149 | |
| 5 | 1156 | Rasheed DWYER |  JAM | 20.54 | 0.161 | |
| 6 | 1636 | Clarence MUNYAI |  RSA | 20.55 | .543 | 0.164 | 
| 7 | 1823 | Serhiy SMELYK |  UKR | 20.55 | .547 | 0.155 | 
| 1681 | Alex WILSON |  SUI | DNS | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1913 | Noah LYLES |  USA | 19.86 Q | 0.208 | 
| 2 | 625 | Alex QUIÑÓNEZ |  ECU | 19.95 Q | 0.184 | 
| 3 | 475 | Zhenye XIE |  CHN | 20.03 q | 0.185 | 
| 4 | 620 | Yancarlos MARTÍNEZ |  DOM | 20.28 SB | 0.165 | 
| 5 | 399 | Brendon RODNEY |  CAN | 20.34 | 0.163 | 
| 6 | 1157 | Andre EWERS |  JAM | 20.61 | 0.153 | 
| 7 | 1087 | Eseosa Fostine DESALU |  ITA | 20.73 | 0.154 | 
| 826 | Miguel FRANCIS |  GBR | DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | ms* | Reaction Time | 
|---|---|---|---|---|---|---|
| 1 | 400 | Andre DE GRASSE |  CAN | 20.08 Q | 0.147 | |
| 2 | 1750 | Kyle GREAUX |  TTO | 20.24 Q | 0.183 | |
| 3 | 841 | Zharnel HUGHES |  GBR | 20.30 | 0.152 | |
| 4 | 1424 | Taymir BURNET |  NED | 20.34 PB | .334 | 0.153 | 
| 5 | 1626 | Anaso JOBODWANA |  RSA | 20.34 SB | .340 | 0.152 | 
| 6 | 1153 | Yohan BLAKE |  JAM | 20.37 | 0.156 | |
| 7 | 565 | Reynier MENA |  CUB | 20.61 | 0.137 | |
| 8 | 1460 | Divine ODUDURU |  NGR | 20.84 | 0.137 | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second