The semi-finals were dominated by world leader Christian Coleman, who was allowed to compete despite missing three doping tests in the year due to a technicality,[2] and blasted a 9.88 while no other qualifiers broke 10. The last time qualifier, Filippo Tortu, made the final by .001, running 10.101 over Tyquendo Tracey's 10.102, while Aaron Brown got in by placing second behind Coleman in heat 1 with 10.12.
In the final, defending champion Justin Gatlin got a good start to gain a step on the field, except Coleman got a better start, gaining that step on Gatlin. Unlike 2017, Coleman did not give ground back, extending his lead to a dominating victory in 9.76. A new personal best, world leading time for the season, that becomes the #6 time in history, just 0.02 seconds behind Gatlin's personal best. Returning to form, Andre De Grasse closed and nearly caught Gatlin at the line in 9.90, a new wind legal personal best.
The first athlete in each heat ( Q ) and the next five fastest ( q ) qualified for the first round proper. The overall results were as follows:[6] Wind: P1:+0.1, P2:+0.4, P3:+0.3, P4:+0.0
The first 3 in each heat ( Q ) and the next six fastest ( q ) qualified for the semifinals. The overall results were as follows:[7] Wind: H1:-0.3, H2:-0.8, H3:-0.8, H4:-0.3, H5:-0.3, H6:+0.1