European stalwarts won title for the fourth time when substitute Mario Goetze volleyed in a brilliant goal seven minutes from the end of extra time.
Supporters of the two contestants, who do not want to miss any chance of direct contact with their idol players, invaded the pitch before or during a World Cup game, bringing big trouble for security guards.
Argentina midfielder Angel Di Maria has been ruled out of the World Cup semifinal against the Netherlands with a thigh injury while striker Sergio Aguero has been declared fit to play after recovering from a similar problem.
Humanoid robots dressed in the colours of Germany's and Brazil's national soccer team jerseys are seen during a photo opportunity at the Institute for Computer Science at the University of Bonn in Bonn June 18, 2014.
Neymar has reportedly told family and friends that he wants to play in the World Cup final, should Brazil defeat Germany in Tuesday's semifinal.
Tim Krul came on as a substitute in the final minute of extra time and then saved two penalties in a 4-3 shootout victory over Costa Rica on Saturday, giving the Netherlands a spot in the World Cup semifinals.
Star striker ruled out of Cup with fractured vertebra after harsh tackle
There were no wild celebrations or congratulatory backslaps for Germany after it beat France 1-0 in the quarterfinals on Friday to become the first country to reach the semifinals at four successive World Cups.
Gonzalo Higuain's superb early strike secured a nervy 1-0 win for Argentina against Belgium and sent the South Americans through to the last four of the World Cup for the first time in 24 years on Saturday.
Neymar is out of the World Cup after suffering a fractured vertebra in Brazil's 2-1 victory over Colombia on Friday.
China's online shopping websites have lost no time cashing in on the notoriety of Luis Suarez, world soccer's bad boy.
Germany broke French hearts for the third time in the World Cup when they triumphed 1-0 at the Maracana on Friday to become the first country to reach the semi-finals in four successive tournaments.