Some have claimed that the reigning world and European champions will not be as formidable at this summer's World Cup due to an ageing squad that is starting to come towards the ends of its cycle.
La Roja have won the last three major international tournaments after their 2010 World Cup triumph in South Africa was sandwiched between their European Championships wins of 2008 and 2012.
However Manchester United stopper David de Gea disagrees with talk that his national side are not the force they were two years ago at Euro 2012 and believes his compatriot's are still "the best team in the world".
“I’m happy to be here. In the Under-21s I played good football for several years, trying to play the same game as the best and with some very good players.
“It’s been a long and hard season for many of the national team players but they are the best in the world and hopefully we can win the title.”
De Gea, who joined United from Atletico Madrid for around £19million in 2011, has been called up to the squad following Barcelona goalkeeper Victor Valdes' injury.
Despite United's wretched campaign last season, De Gea drew widespread plaudits for his performances, and the 23-year-old won the club's Player of the Season.
Pepe Reina and Iker Casillas make up the rest of the goalkeeping department for Spain for next month's tournament.