By FOX Sports Staff
Italy managed to match Spain toe-to-toe for most of the game and the defending World Cup champions had to force the win via a penalty shootout after Leonardo Bonucci fired his shot over the crossbar.
Casillas admitted that his side were lucky to reach another cup final after the tough fight put up by the Azzurri.
"This generation is unforgettable. Lucky for the Spanish to have seen another win and we're in the final," Casillas said to Tele-5.
"The truth is it was very difficult to win. Italy had made an excellent approach. We tested Buffon as well but they placed us in trouble.
"The thing about the shoot-out is it is a lottery and we have been lucky enough to win. My team-mates have had full success on the penalties and they [Italy] missed one."
"Again, we have to admit Italy played a great game. They could be up here talking about an Italy-Brazil in the final if not for a few bounces of the ball," he said.
"Italy had a very good style of play that we didn't expect, defensively they left a few gaps and we had chances to score. Navas was close in the second half of extra time. I'm sure that Brazil, however, will not have that particular style of play against us."
Casillas has urged his team mates to turn their focus to the Confederations Cup final against hosts Brazil on Sunday.
"We have to recover, physically speaking. We're used to playing games on Wednesday and then on Sunday so we have no excuses not to be match fit.
"We are very tired. We need to rest. We will have to face Brazil in the Maracana. We will try to play a good game."