Budapest - The United States broke the world record for the mixed 4x100m medley relay for the second time on Wednesday to win world championship gold, just hours after lowering the mark in the heats.
The American quartet of Matt Grevers, Lilly King, Caeleb Dressel and Simone Manuel clocked three minutes 38.56 seconds with Australia taking silver, 2.65 seconds back.
Canada and China shared bronze after both finished 2.69 seconds behind.
In the morning heats, the USA shattered the previous record with a time of 3:40.28.