On the fifth day of competition, Adrian won the gold medal in the 100-meter freestyle final, defeating favorite James Magnussen of Australia by one one-hundredth (0.01) of a second. In the race, Adrian set a new personal record with a time of 47.52. Going into the 100-meter freestyle final, Adrian was seeded second with a time of 47.97, which was only the second time he ever broke 48 seconds in the event. In winning the 100-meter freestyle, Adrian became the first American male to win the event since Matt Biondi did in 1988.