Del Bosque, a former Real Madrid player and manager, was in charge of the Spain team that won the 2010 World Cup in South Africa, succeeding Luis Aragones, who coached the team to Euro 2008 success.
Spain's starting XI on Sunday is likely to include at least five players schooled at Barcelona - Andres Iniesta, Xavi, Gerard Pique, Jordi Alba and Sergio Busquets.
And Del Bosque added that the national team had learnt to translate their success at club level to the international game.
"Our success is not a coincidence and has its foundations in many things - in the structure of our football, in the academies, and in better coaches," Del Bosque told the Spanish football federation website.
"The Spanish clubs are devoting themselves to training youngsters.
"Before we would travel abroad to look at the academies in France, Russia, Germany. Now many of these countries come to see what we are doing in Spain.
"We have put a certain complex regarding Europe behind us and right now we are at the same level as any country in our vicinity."