After the match Del Bosque revealed that he was pleased with the performance of his midfield players, while reserving special praise for the Premier League duo.
"We started very strongly and at the end we let go, but we had controlled the match," the coach told the Spanish Federation's official website. "Our midfielders were able to dominate the entire game.
"Silva and Mata are very important players. They link up well in midfield. They had a great game."
Spain have a 100% winning record in their qualifying group with seven wins from seven matches.