After 19 games and nearly 30 hours of football qualifiers, it comes down to this for the Socceroos and their World Cup hopes.
One game, winner takes all, against Peru for the chance to fill one of the last two spots available at the finals in Qatar.
Graham Arnold's men eliminated the United Arab Emirates last week in the Asian (AFC) qualifying playoff with a 2-1 victory in Qatar to give themselves a shot at the finals after missing out on automatic qualification.
Peru finished fifth in the South American (CONMEBOL) qualification, missing out on an automatic spot in the finals.
Australia has qualified for the last four World Cups — in 2006, 2010, 2014 and 2018. Can they make it five in a row?
Read on for all the details about this match that will decide the Socceroos' World Cup fate.
Where will the match be played?
The venue for the vital playoff is the Ahmed Bin Ali Stadium, otherwise known as the Al-Rayyan Stadium, outside the Qatari capital, Doha.
The multi-purpose stadium seats 50,000 and has been redeveloped as one of the eight venues for this year's World Cup.
While previous World Cup playoffs have been played on a two-leg, home-and-away basis — such as the Socceroos vs Honduras in 2017 — the playoffs for the 2022 World Cup are being held as standalone matches at neutral venues.
What time is the Socceroos' game?
The game begins at 9pm on Monday local time in Doha, which is 4am AEST on Tuesday (in Sydney, Melbourne, Canberra, Brisbane, Hobart).
If you are in Adelaide, Alice Springs or Darwin, the game starts at 3:30am ACST.
If you are in Perth, the game starts at 2am AWST.
If you are on Lord Howe Island, you are on Lord Howe Island time and the game starts at 4:30am.
How do I watch the game?
You can watch the Socceroos vs Peru game live on free-to-air television on Channel 10.
Coverage begins at 3:30am AEST on the east coast and Tasmania, 3:00am ACST in South Australia and the Northern Territory and 1:30am AWST in the west.
The game can also be streamed live on 10 Play, or if you have a subscription it can be streamed on Paramount+.
You can also keep up with the action via the ABC's live blog with Samantha Lewis, which will kick off at 3:30am AEST on www.abc.net.au/sport.
How have the Socceroos gone in previous World Cup playoffs?
This will be the 10th time the Socceroos have been in a playoff for a spot in the World Cup.
Australia's record in these games is three wins, six losses.
This will be the fourth time the Socceroos have faced a South American nation in the decisive tie.
In 1993, the Socceroos lost 2-1 on aggregate to Diego Maradona and Argentina in a two-leg playoff.
Eight years later, the Australians again fell at the final hurdle, losing to Uruguay 3-1 on aggregate, thanks to a 3-0 away loss in the second leg.
Of course, in 2005, the Socceroos ended their wait for a World Cup spot, beating Uruguay in a penalty shootout in Sydney after a two-leg playoff, thanks to THAT spot-kick from John Aloisi.
ABC/AAP