Coming out of the blocks in the final, Wayde van Niekerk and Isaac Makwala were the first to make up ground on the stagger, coming off the turn with Ramil Guliyev about even. Makwala started to lose ground, passed by Jereem Richards to his outside. van Niekerk seemed to have the edge until the last 30 metres when Guliyev pulled ahead. As Richards closed, all the athletes leaned for a photo finish. Guliyev had a clear win, but van Niekerk's edge for silver on Richards was the narrowest possible, .001 of a second 20.106 to 20.107.
Records
Before the competition records were as follows:[2]
The first round took place on 7 August in seven heats. However, Isaac Makwala, who was prevented from competing due to being quarantined for norovirus, was allowed to run in an additional heat on the 9 August following an appeal by the Botswana delegation.[6] The 8 heats were as follows:[7]