The Spaniards, who won the 2010 World Cup in South Africa, are trying to become the first team to win three successive major international tournaments.
“We have an aim that no-one has ever achieved before and that is beautiful,” Del Bosque said. “We do have a lot of pressure because there is a lot of optimism that surrounds us.
“But we are accustomed to the pressure because we are defending the title and we are world champions. However, we cannot think that we are out of this world and we are going to win. It would be a huge mistake to have that attitude.”