| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 175 | Alison DOS SANTOS | 
                                         
                                        BRA
                                     | 
                                    50.90 Q | 0.197 | 
| 2 | 540 | Bassem HEMEIDA | 
                                         
                                        QAT
                                     | 
                                    51.14 Q | 0.191 | 
| 3 | 655 | Cory Poole | 
                                         
                                        USA
                                     | 
                                    51.27 | 0.216 | 
| 4 | 583 | Carl BENGTSTRÖM | 
                                         
                                        SWE
                                     | 
                                    51.55 | 0.204 | 
| 5 | 460 | Moitalel MPOKE | 
                                         
                                        KEN
                                     | 
                                    51.94 | 0.222 | 
| 6 | 336 | Ierotheos Dritsas | 
                                         
                                        GRE
                                     | 
                                    52.38 | 0.164 | 
| 7 | 349 | Boaz Madeus | 
                                         
                                        HAI
                                     | 
                                    54.45 | 0.197 | 
| 488 | Ismail Manyani | 
                                         
                                        MAR
                                     | 
                                    DQ | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 427 | Malik JAMES-KING | 
                                         
                                        JAM
                                     | 
                                    50.34 Q | 0.176 | 
| 2 | 379 | Mahdi PIRJAHAN | 
                                         
                                        IRI
                                     | 
                                    50.98 Q NU20R | 0.189 | 
| 3 | 306 | Alex Knibbs | 
                                         
                                        GBR
                                     | 
                                    50.99 | 0.282 | 
| 4 | 144 | Rasheeme GRIFFITH | 
                                         
                                        BAR
                                     | 
                                    51.02 SB | 0.205 | 
| 5 | 439 | Yusuke Shirao | 
                                         
                                        JPN
                                     | 
                                    51.21 | 0.178 | 
| 6 | 554 | Lourens Steenekamp | 
                                         
                                        RSA
                                     | 
                                    51.26 | 0.169 | 
| 7 | 574 | Julien BONVIN | 
                                         
                                        SUI
                                     | 
                                    51.83 | 0.186 | 
| 244 | Aleix PORRAS | 
                                         
                                        ESP
                                     | 
                                    DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 555 | Sokwakhana ZAZINI | 
                                         
                                        RSA
                                     | 
                                    49.43 Q | 0.171 | 
| 2 | 294 | Alastair CHALMERS | 
                                         
                                        GBR
                                     | 
                                    50.11 Q NU20R | 0.174 | 
| 3 | 428 | Leonardo LEDGISTER | 
                                         
                                        JAM
                                     | 
                                    50.13 q PB | 0.169 | 
| 4 | 400 | Alessandro SIBILIO | 
                                         
                                        ITA
                                     | 
                                    50.73 q SB | 0.155 | 
| 5 | 647 | Quivell JORDAN-BACOT | 
                                         
                                        USA
                                     | 
                                    50.86 | 0.172 | 
| 6 | 496 | Ramsey ANGELA | 
                                         
                                        NED
                                     | 
                                    51.99 | 0.180 | 
| 7 | 229 | Jesús David DELGADO | 
                                         
                                        ESP
                                     | 
                                    52.18 | 0.187 | 
| 8 | 143 | Nathan Fergusson | 
                                         
                                        BAR
                                     | 
                                    54.58 | 0.162 |