The men's 4 × 100 metres relay at the 2019 World Athletics Championships was held at the Khalifa International Stadium in Doha, Qatar, from 4 to 5 October 2019.

[1] Defending champion Great Britain was back with two members of their winning team, taking the qualifying heats with a world leading time.

Lyles spent the 2019 season coming back after slow starts, essentially demonstrating his superior top end speed.

With a smooth handoff, as Justin Gatlin took his first step, he was ahead of China meaning USA would have no traffic interference for the rest of the race.

On the second leg, Gatlin separated from Xu Zhouzheng and Zharnel Hughes also lost a little to the Olympic champion, but USA was right where GBR could watch them.

Through the turn, Rodgers separated from Kilty, Kiryū also gained with Japan passing in second place and South Africa was pulling close to Brazil to create a traffic jam.