Coleman, 23, started well and extended his lead down the stretch to win in 9.76 seconds. Defending champion Justin Gatlin finished second in the marquee event of the championships, dominated by Usain Bolt until his loss to Gatlin in 2017. Andre de Grasse of Canada was third.
Coleman was the silver medalist behind the 37-year-old Gatlin in 2017. In Doha, they ran side-by-side, but Gatlin never really threatened.