First 3 in each heat (Q) and the next 6 fastest (q)

POS Rank Heat BIB ATHLETE COUNTRY RESULTS ms*
1 1 2 1001 Kirani JAMES GRNGRN 44.94 Q
2 1 4 1920 Michael NORMAN USAUSA 45.00 Q
3 2 4 1158 Demish GAYE JAMJAM 45.02 Q
4 1 6 1288 Emmanuel Kipkurui KORIR KENKEN 45.08 Q .071
5 1 3 1096 Davide RE ITAITA 45.08 Q .077
6 3 4 305 Leungo SCOTCH BOTBOT 45.10 Q PB
7 2 2 1217 Julian Jrummi WALSH JPNJPN 45.14 Q PB
8 2 3 1903 Fred KERLEY USAUSA 45.19 Q
9 1 1 1749 Machel CEDENIO TTOTTO 45.26 Q
10 2 6 244 Jonathan SACOOR BELBEL 45.32 Q
11 2 1 1154 Akeem BLOOMFIELD JAMJAM 45.34 Q
12 3 6 830 Rabah YOUSIF GBRGBR 45.40 Q
13 3 1 1637 Thapelo PHORA RSARSA 45.45 Q
14 3 3 360 Abbas Abubakar ABBAS BRNBRN 45.47 Q
15 3 2 1921 Vernon NORWOOD USAUSA 45.59 Q
16 4 6 535 Jhon Alejandro PERLAZA COLCOL 45.62 q
17 4 1 1286 Alphas Leken KISHOYIAN KENKEN 45.65 q
18 1 5 222 Steven GARDINER BAHBAH 45.68 Q
19 4 3 1336 Mazen Mawtan AL YASEN KSAKSA 45.70 q
20 5 6 1931 Nathan STROTHER USAUSA 45.71 q
21 4 4 1338 Yousef KARAM KUWKUW 45.74 q
22 4 2 154 Steven SOLOMON AUSAUS 45.82 q
23 5 2 1631 Derrick MOKALENG RSARSA 45.87 .863
24 2 5 414 Philip Osei CANCAN 45.87 Q .864
25 5 4 223 Alonzo RUSSELL BAHBAH 45.91
26 3 5 536 Anthony José ZAMBRANO COLCOL 45.93 Q
27 5 1 357 Lucas CARVALHO BRABRA 46.01
28 4 5 310 Ditiro NZAMANI BOTBOT 46.19
29 5 5 1161 Rusheen MCDONALD JAMJAM 46.21
30 5 3 1265 Mikhail LITVIN KAZKAZ 46.28
31 6 6 1073 Taha Hussein YASEEN IRQIRQ 46.58
32 6 4 1368 Todisoa Franck RABEARISON MADMAD 46.80 NR
33 6 2 2085 Luka JANEŽIČ SLOSLO 46.84
34 6 5 2038 Brandon Parris VINVIN 47.39
35 7 6 985 Jessy FRANCO GIBGIB 47.41 NR
36 6 3 450 Bachir MAHAMAT CHACHA 47.65
37 6 1 1598 Abdalelah Haroun QATQAT 47.76 SB
38 7 3 1409 Jovan STOJOSKI MKDMKD 47.92
39 7 4 1477 Moussa Zaroumeye NIGNIG 48.13
40 7 5 229 Mohammad Jahir RAYHAN BANBAN 48.48
41 7 2 2028 Tikie Terry Mael VANVAN 48.52 PB
1 832 Matthew HUDSON-SMITH GBRGBR DNF
Legend

ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second