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#2 Argentina: 76 appearances
If there is one thing that has been assured when Argentina are at the World Cup, it is their presence in the knockout stages in recent editions. 2006 and 2010 saw them reach the quarter-finals while 2014 saw them finish as runners-up after a 1-0 loss to Germany in the final.
Of course, a lot of it has to do with the presence of Lionel Messi. A man who has won everything possible with Barcelona has found success on the international stage hard to come by - what with three consecutive losses in finals of the World Cup and two Copa Americas.
Messi (124 caps) will be playing in his fourth World Cup as is his teammate Javier Mascherano (143 caps). The defender is the most experienced member of the squad and the two are the only players with more than 100 caps.
Other experienced players include Angel Di Maria, Sergio Aguero, and Gonzalo Higuain. All three attackers will be playing in their third World Cup.
Argentina's average age at the World Cup is 29 years and 93 days.
