HERZOGENAURACH, Germany, June 27 - Argentina striker Carlos Tevez warned Germany on Tuesday that they would have to up their game in the World Cup quarter-final in Berlin on Friday.

He said great players rise to the occasion in big matches, that Argentina had many and Germany would have to show more than they have so far in the tournament to beat them.

"We must show balls," Tevez said when asked how Argentina should play Germany.

"It's going to be a very, tough match, cerebral too.

"Germany are going to have to show more than they have done so far to beat us," said the striker, a member of Argentina's talented bench.

"They know that if they let us play, we can cause them problems," he told a news conference after training.

"I like to play with the crowd against me, we Argentine players are used to that ...

"The great players and the great teams show themselves there (in the difficult matches)."