The 2014 champions will be looking to repeat that success in Russia, and they have the squad to do it.
South Korea scraped into the 2018 tournament, behind the play of Son Heung-min.
Both favourites before the tournament started, Brazil and Germany desperately need wins today.
Iceland topped their group which was no small achievement considering Croatia were the strong favourites.
Peru beat New Zealand 2-0 in the second leg of the playoffs to book a place in Russia.
Australia played 22 games to qualify for the tournament, the most of any nation in history.
After Argentina's victory last night, Diego Maradona had to receive medical attention.
Despite a young and improved squad, Nigeria have been put in a very tough group
Messi goal: Brilliant composure and three magical touches to give Argentina the lead
After two horrible performances, Argentina need some luck to progress to the next round.