| POS | BIB | ATHLETE | COUNTRY | MARK | 
|---|---|---|---|---|
| 1 | 1126 | Kipyegon Bett |  KEN | 1:45.76 Q | 
| 2 | 1307 | Andreas KRAMER |  SWE | 1:45.98 Q | 
| 3 | 1447 | Drew Windle |  USA | 1:46.08 Q | 
| 4 | 1336 | Abdessalem AYOUNI |  TUN | 1:46.19 q | 
| 5 | 1261 | Andrés ARROYO |  PUR | 1:46.46 | 
| 6 | 1460 | Edose IBADIN |  NGR | 1:46.51 | 
| 7 | 1353 | Saud Alzaabi |  UAE | 1:53.34 | 
| 8 | 1193 | Pyae Sone Maung |  MYA | 2:13.38 | 
| 603 | Amine Belferar |  ALG | DNF | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 400m | 51.61 |  Andreas KRAMER |  SWE | 
| POS | BIB | ATHLETE | COUNTRY | MARK | 
|---|---|---|---|---|
| 1 | 1202 | Thijmen KUPERS |  NED | 1:45.53 Q | 
| 2 | 760 | Brandon MCBRIDE |  CAN | 1:45.69 Q | 
| 3 | 872 | Kevin LÓPEZ |  ESP | 1:45.77 Q | 
| 4 | 684 | Antoine Gakeme |  BDI | 1:45.97 q | 
| 5 | 966 | Kyle LANGFORD |  GBR | 1:46.38 q | 
| 6 | 1187 | Jesus Tonatiu LOPEZ |  MEX | 1:46.71 | 
| 7 | 627 | Leandro Paris |  ARG | 1:47.09 PB | 
| 8 | 619 | Pol MOYA |  AND | 1:49.06 | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 400m | 51.80 |  Brandon MCBRIDE |  CAN | 
| POS | BIB | ATHLETE | COUNTRY | MARK | 
|---|---|---|---|---|
| 1 | 1145 | Ferguson Cheruiyot ROTICH |  KEN | 1:45.77 Q | 
| 2 | 1399 | Isaiah HARRIS |  USA | 1:45.82 Q | 
| 3 | 957 | Elliot GILES |  GBR | 1:45.86 Q | 
| 4 | 1160 | Ebrahim ALZOFAIRI |  KUW | 1:46.29 q PB | 
| 5 | 864 | Álvaro DE ARRIBA |  ESP | 1:46.42 q | 
| 6 | 1173 | Abdelati EL GUESSE |  MAR | 1:46.74 | 
| 7 | 1263 | Ryan SÁNCHEZ |  PUR | 1:50.74 | 
| 1230 | Wesam Almassri |  PLE | DNS | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 400m | 51.95 |  Ferguson Cheruiyot ROTICH |  KEN | 
| POS | BIB | ATHLETE | COUNTRY | MARK | 
|---|---|---|---|---|
| 1 | 1138 | Emmanuel Kipkurui KORIR |  KEN | 1:47.08 Q | 
| 2 | 1250 | Michał ROZMYS |  POL | 1:47.09 Q | 
| 3 | 713 | Thiago ANDRÉ |  BRA | 1:47.22 Q | 
| 4 | 1015 | Alex AMANKWA |  GHA | 1:47.56 | 
| 5 | 1006 | Marc REUTHER |  GER | 1:47.78 | 
| 6 | 923 | Samir Dahmani |  FRA | 1:48.62 | 
| 7 | 637 | Peter BOL |  AUS | 1:49.65 | 
| 8 | 632 | Ahmed Bashir Farah |  ART | 1:50.04 PB | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 400m | 52.90 |  Marc REUTHER |  GER | 
| POS | BIB | ATHLETE | COUNTRY | MARK | 
|---|---|---|---|---|
| 1 | 707 | Nijel AMOS |  BOT | 1:47.10 Q | 
| 2 | 919 | Pierre-Ambroise BOSSE |  FRA | 1:47.25 Q | 
| 3 | 1244 | Adam KSZCZOT |  POL | 1:47.36 Q | 
| 4 | 1179 | Mostafa SMAILI |  MAR | 1:47.50 | 
| 5 | 1054 | Mark ENGLISH |  IRL | 1:48.01 | 
| 6 | 1360 | Salim Abu MAYANJA |  UGA | 1:48.11 | 
| 7 | 747 | Francky MBOTTO |  CAF | 1:51.76 | 
| 848 | Hamada Mohamed |  EGY | DNF | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 400m | 52.26 |  Salim Abu MAYANJA |  UGA | 
| POS | BIB | ATHLETE | COUNTRY | MARK | 
|---|---|---|---|---|
| 1 | 1379 | Donavan BRAZIER |  USA | 1:45.65 Q | 
| 2 | 892 | Mohammed Aman |  ETH | 1:45.81 Q | 
| 3 | 967 | Guy LEARMONTH |  GBR | 1:45.90 Q | 
| 4 | 1245 | Marcin LEWANDOWSKI |  POL | 1:46.17 q | 
| 5 | 701 | Amel TUKA |  BIH | 1:46.54 | 
| 6 | 1156 | Astrit Kryeziu |  KOS | 1:49.94 | 
| 856 | Daniel Andújar |  ESP | DQ | |
| 1459 | Michael SARUNI |  KEN | DNS | 
| Split | Mark | Athlete | COUNTRY | 
|---|---|---|---|
| 400m | 51.90 |  Donavan BRAZIER |  USA |