Australia start their bid to retain the Asian Cup on Sunday when they play Jordan in their opening Group B game at the Hazza bin Zayed Stadium in Al Ain.
They won the competition for the first time in their history four years ago when James Troisi's goal in extra time saw them defeat South Korea 2-1 in Sydney.
But how have the defending champions done in the past in the competition at repeating their triumph? Here is a look at how the recent winners have fared.
It had all gone initially to plan for the Japanese in Australia under the stewardship of manager Javier Aguirre as they won Group D with nine points out of nine.
However, it all went wrong in the quarter-finals in Sydney as they were eliminated by the UAE.
Ali Mabkhout's early goal had put the UAE in charge, but the Japanese levelled nine minutes from time as Gaku Shibasaki found the net.
There were no more goals and the game went to penalties where both Keisuke Honda and Shinji Kagawa failed to convert their spot-kicks, allowing the UAE to prevail and go on to the semi-finals.
More on Asian Cup:
Son Heung-min can ignite South Korea: Five men to watch in the tournament
The 2007 champions began their title defence badly by losing to Iran 2-1 in their opening group game.
But a 1-0 win over the UAE, thanks to a stoppage-time own goal from Walid Abbas, before beating North Korea 1-0 thanks to Karrar Jassim's strike, saw them qualify for the knockout stages.
That was as far as they would go though as they lost 1-0 to Australia, after extra time, in the quarter-finals.
The Japanese were bidding to win the event for a third time in a row, but came up short at the semi-final stages.
They had qualified top from Group B in matches played in Vietnam and Thailand.
Australia were beaten on penalties in the quarter-finals after a 1-1 draw, but they were lost an entertaining semi-final 3-2 to Saudi Arabia in Hanoi despite goals from Yuzi Nakazawa and Yuki Abe.
To rub salt in the wound they lost the play-off for third on penalties to South Korea.
The last team to successfully win back-to-back Asian Cup titles were the Japanese, who were managed by Brazilian great Zico.
After topping their group they had a scare in the quarter-finals as they were taken to penalties by Jordan where they prevailed 4-3 despite failing to score with their first two efforts.
They needed a last-minute goal from Yuzi Nakazawa to force extra time in the semi-final with Bahrain. Keiji Tamada then struck the winner to put them in the final where they cruised past hosts China 3-1.
2000 Saudi Arabia
The Saudis had won the 1996 tournament by beating the UAE on penalties, and given they had won two in a row in 1984 and 1988, they headed to Lebanon in 2000 hopeful they could match that accomplishment.
Despite being beaten 4-1 by Japan in their opening match, a goalless draw with Qatar and a 5-0 win over Uzbekistan, in which Mohammed Al Shalhoub bagged a hat-trick, took them to the quarter-finals.
They defeated Kuwait 3-2 after extra time before two goals from Talal Al Meshal got them past South Korea 2-1 in the semi-finals.
However, they lost again to Japan in the final 1-0 in Beirut.