In his first 100m in four years, Norman smashed his previous personal best mark by 0.31 seconds.
"After four long years I finally got to run the 100m," 22-year-old Norman posted on Twitter.
With his new personal best, Norman became only the second man in history to run sub-10 for 100m, sub-20 for 200m and sub-44 for 400m. Olympic 400m champion Wayde van Niekerk was the first man in history to go sub-10, sub-20, and sub-44.
Michael Norman's personal best times:
Rai Benjamin, Norman’s training partner and the joint third-fastest man in history in the 400 m hurdles, was also in the race clocking a huge PB of 10.03.
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