Champions make waves - London 2012 - Water Polo
Defending champions Hungary produced the performance of the day in the men's Water Polo competition, as they announced their intention not to give up their title without a fight.
The reigning Olympic gold medallists shrugged off the USA in a superb performance, winning 11-6.
The victory puts the Hungarians ahead of the USA in Group B.
Their defensive display stopped their opponents finding the back of the net, while at the other end their accuracy and efficiency in front of goal was merciless.
Norbert Hosnyanszky blasted a hat-trick for the Hungarians, while captain Peter Biros netted two.
Adam Steinmetz, Norbert Madaras, Tamas Varga, Marton Szivos, Gergely Kiss and Tamas Kasas scored one apiece.
They hardly needed to get out of second gear as they brushed aside their opponents 12-4 to remain unbeaten in the competition.
The Beijing 2008 bronze medallists and European champions came into the Olympics as favourites, and their form will worry the other teams in the quarter-finals.
Australia went behind in the opening minutes of the contest, but strong second and third periods gave them a well-earned win and a place in the knockouts.
The in-form side had already guaranteed top spot in Group A and a place in the quarter-finals, but their record of five wins from five matches sends a strong message to their rivals.
Aleksandar Radovic and Boris Zlokovic scored hat-tricks for Montenegro, while Mladan Janovic and Aleksandar Ivovic netted a brace each.