The Jamaican team of Nesta Carter, Michael Frater, Yohan Blake and Usain Bolt won the gold medal in the men's 4x100m relay at the London Olympics on Saturday in a world record time of 36.84 seconds.
The United States were second and Trindad and Tobago were third.
The Australian team of Anthony Alozie, Isaac Ntiamoah, Andrew McCabe and Joshua Ross finished seventh in 38.43.