Captain sees win over Paraguay as double boost
With the game scoreless, Cardozo stepped up to take a spot-kick just before the hour mark after Gerard Pique had fouled the Benfica man, but Casilllas got down to stop the penalty with an excellent save before David Villa won the game late on with his fifth goal of the tournament.
And his understudy in the Spain squad, Liverpool's Reina, played an important role in the save.
"I was nervous but also very happy for the team. Pepe Reina, who is a phenomenon, let me know which way Cardozo would strike the penalty and I saved it," he told AS.
Casillas insisted that hard-fought victories such as the win against the South Americans will put Spain in good stead for the remainder of the competition, but he is wary of the stern test the Germans will provide on Wednesday.
"We have suffered more than necessary but such victories give you a double boost. Germany comes from beating England and Argentina. They are a young team that are playing very well and for us it will be very difficult."