Dressel failed to sweep seven gold medals at the back-to-back world championships. He took seven world titles in Budapest two years ago.

He had previously claimed six titles at these worlds in the 50m butterfly, the 100m butterfly, the 50m freestyle, the 100m freestyle, the 4x100m freestyle relay and the mixed 4x100m freestyle relay.

In the women's 4x100m medley relay final, the US team set a new world record of 3:50.40 to break the prior record of 3:51.55 created by the United States itself in Budapest two years ago.

Australia took the silver in 3:53.42, and Canada came third in 3:53.58 to win the bronze.