Caeleb Dressel made good on every bit of his potential as an individual swimmer in Tokyo, winning the men's 50m freestyle to complete a three-for-three performance in his solo Olympic events.
Dressel swam the single length of the pool in 20.07, an Olympic record.
His margin over second place, .48, is the largest margin of victory in the event's Olympic history.
A pair of veterans followed Dressel for silver and bronze, 30-year-old Florent Manaudou of France and 32-year-old Brazilian Bruno Fratus. American Michael Andrew finished fourth.
Dressel has the chance for another medal, potentially another gold, later in the night in the men's 4x100m medley relay. Dressel will swim the butterfly leg.