Germany were crowned world champions for the fourth time as Mario Gotze's extra-time winner beat Argentina in the 2014 World Cup final.
Gotze demonstrated perfect technique and commendable calm to chest down Andre Schurrle's pass and sweep in a left-foot finish with the prospect of a penalty shootout only seven minutes away.
Argentina, with skipper Lionel Messi looking subdued despite flashes of his talent, could not respond and Germany claimed their first World Cup since they beat the same opponents in Rome 24 years ago.
The success means Joachim Low's side have become the first European team to win the trophy in South America.
Gonzalo Higuain wasted Argentina's best chance in the first half while Germany defender Benedikt Howedes hit the post with a header seconds before half-time.
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