Ramos has suggested that Iran made life tough for his side by repeatedly wasting time when the game was level at 0-0, but admits that an improved performance is required against Morocco to land top spot ahead of Portugal.
"They went out to waste time, whereas we like to win in a different way," he told reporters. "We leave happy. We've taken another step forward and now we have to try to top our group, it's our objective. I still think we can improve in all aspects."
Portugal and Spain are level on points and goal difference heading into the final round of fixtures.