Marcell Jacobs — 9.80 seconds

Italian sprinter Marcell Jacobs stunned the world by winning the Tokyo 2020 Olympic 100m gold in 9.80 seconds — the only Italian to ever win a senior world or Olympic 100m title. His rapid improvement from 10.20s in 2019 to Olympic champion in 2021 was the most dramatic sprint progression since Maurice Greene, and he backed it up with European championship gold.