Germany's 7-1 humiliation of hosts Brazil is "dangerous" - according to centre-half Per Mertesacker.
The Arsenal defender, 29, claims his side will "have no chance" in Sunday's World Cup final against Argentina if they drop their performance levels even five per cent.
The Germans produced one of the biggest shocks in football's history in Tuesday's semi-final.
"We can't lose our focus now because we scored seven goals," said Mertsesacker.
"If you look at the stats, the passing, the goals we scored, everything was so fluent.
"We must keep calm and be aware of the situation. We want more history. We don't want to just settle for this result before the final."
Sunday's World Cup final could feature up to seven nominees for the 2014 Golden Ball - the prize awarded to the best player of the tournament.
Angel Di Maria, Javier Mascherano and Lionel Messi are nominated for Argentina, while Mats Hummels, Toni Kroos, Philipp Lahm and Thomas Muller have been picked out for Joachim Low's side.