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

First 2 of each heat (WQ) plus 2 fastest times (Wq) qualify to World Athletics Championships and World Athletics Relays Final

Heat 1 10 MAY 2025 20:03 Please click on a row below to view more information

POS BIB ATHLETE COUNTRY MARK Reaction Time
1 BEL Belgium BEL BEL 42.80 WQ SB 0.147
2 GBR Great Britain & NI GBR GBR 42.92 WQ SB 0.143
3 AUS Australia AUS AUS 43.15 0.155
4 FRA France FRA FRA 43.29 SB 0.215
5 CHI Chile CHI CHI 43.64 NR 0.158
6 CIV Côte d’Ivoire CIV CIV 44.85 SB 0.165

Heat 2 10 MAY 2025 20:11 Please click on a row below to view more information

POS BIB ATHLETE COUNTRY MARK Reaction Time
1 ESP Spain ESP ESP 42.18 WQ NR 0.150
2 JAM Jamaica JAM JAM 42.51 WQ SB 0.160
3 GER Germany GER GER 42.98 Wq SB 0.167
LBR Liberia LBR LBR DNF 0.130
POL Poland POL POL DQ 0.166
CHN PR of China CHN CHN DQ 0.132

Heat 3 10 MAY 2025 20:19 Please click on a row below to view more information

POS BIB ATHLETE COUNTRY MARK Reaction Time
1 USA United States USA USA 42.86 WQ 0.143
2 CAN Canada CAN CAN 43.11 WQ 0.165
3 NED Netherlands NED NED 43.13 Wq SB 0.175
4 ITA Italy ITA ITA 43.30 SB 0.185
5 POR Portugal POR POR 44.18 SB 0.163
SUI Switzerland SUI SUI DNF 0.177