In the morning of day seven, Dressel swam a 21.29 in the prelims heats of the 50 meter freestyle, taking first, breaking the Championships record, and advancing to the semifinals. In the evening of day seven, Dressel swam in the final of the 100 meter butterfly and the semifinals of the 50 meter freestyle. In the final of the 100 meter butterfly, Dressel swam a 49.87, winning the final and swimming under 50 seconds for the fifth time. His swim qualified him to represent the United States in the 100 meter butterfly at the 2020 Summer Olympics. In the semifinals of the 50 meter freestyle, Dressel posted a 21.51, advancing as the fastest seed to the final.