It has been claimed that several members of Vicente Del Bosque's side do not see eye to eye, but while the goalkeeper insists that is not true, he concedes it was only a year ago.
|TEAM EXPERT VIEW
|Ben Hayward | Spain Expert
Had the European Championship been played a year ago, this may have been an issue. Barcelona and Real Madrid had just done battle four times in the space of 17 days and there was plenty of bad blood following the quartet of Clasico clashes.
However, all of the problems from a year ago, including the issue between Gerard Pique and Sergio Ramos, have been resolved.
The only controversy this time around is an interview given by Xavi last week in which he once again claimed that Madrid were sore losers and took a potshot at Jose Mourinho. That said, there is a real bond between the players in this Spain side and by the time they line up against Italy today, all of that will be forgotten.
"This tension is now gone and I think we should look on the bright side: we have moved on."
Spain go into Euro 2012 as the reigning world and European champions, but Casillas acknowledges that history counts for nothing when it comes to major international tournaments.
"We know that the past is worthless," he explained. "We have a good record but we cannot survive on our memories. We want to do well and continue winning."
Spain kick off their campaign against Italy, who are being written off by many pundits after their shocking 3-0 defeat by Russia in their final warm-up fixture.
Nonetheless, Casillas remains very wary of the threat posed by the Azzurri.
"I've seen videos of Italy and I think they a great team," the Blancos shot-stopper declared. "They have many interesting players and they have been renovated.
"They have both veterans and hopeful youngsters, with a lot of players from Juventus. I have maximum respect for them."
Spain's opening Group C clash with Italy gets under way at 18:00CET on Sunday.