First 2 in each heat (Q) and the next 2 fastest (q)

POS Rank Heat BIB ATHLETE COUNTRY RESULTS
1 1 1 1591 Wesley Vázquez PURPUR 1:43.96 Q
2 2 1 1295 Ferguson Cheruiyot Rotich KENKEN 1:44.20 Q
3 3 1 1919 Clayton Murphy USAUSA 1:44.48 q
4 1 2 1871 Donavan Brazier USAUSA 1:44.87 Q
5 4 1 647 Adrián Ben ESPESP 1:44.97 q PB
6 2 2 395 Marco Arop CANCAN 1:45.07 Q
7 5 1 828 Elliot Giles GBRGBR 1:45.15
8 3 2 1288 Emmanuel Kipkurui Korir KENKEN 1:45.19
9 6 1 1531 Adam Kszczot POLPOL 1:45.22
10 4 2 1905 Brannon Kidder USAUSA 1:45.62
11 1 3 272 Amel Tuka BIHBIH 1:45.63 Q
12 5 2 1379 Mostafa Smaili MARMAR 1:45.78
13 7 1 1765 Abdessalem Ayouni TUNTUN 1:45.80
14 2 3 1896 Bryce Hoppel USAUSA 1:45.95 Q
15 6 2 1645 Tshepo Tshite RSARSA 1:46.08
16 3 3 651 Álvaro De Arriba ESPESP 1:46.09
17 7 2 104 Yassine Hethat ALGALG 1:46.15
18 4 3 412 Brandon McBride CANCAN 1:46.21
19 5 3 845 Kyle Langford GBRGBR 1:46.41
20 6 3 1281 Ngeno Kipngetich KENKEN 1:46.61
21 8 1 1593 Abubaker Haydar Abdalla QATQAT 1:46.87
22 7 3 761 Pierre-Ambroise Bosse FRAFRA 1:47.60
23 8 2 851 Jamie Webb GBRGBR 1:48.44
3 1376 Oussama Nabil MARMAR DQ