Spain centre-back Sergio Ramos says preparations for the final against Italy are complicated by the fact his side do not know how their opponents will play.
"They changed their style for the first game and for the following matches they changed back to their normal style," said the Real Madrid defender.
"Which style do I prefer? It's a question of keeping calm and waiting to see how they behave on the day. It's important for Spain to remain faithful to our philosophy and to our own style of play.
"We're not obsessed by how Italy will play. We'll wait and see on Sunday."
"It's always good to know your opponents," he said.
"You can learn from the matches, learn about the opposition, and learn from your own mistakes. Italy may change their strategy but Spain will play at our best level and do the best that we can.