La Roja need just a point to be sure of automatic qualification after beating Belarus in Mallorca on Friday evening.
"Beforehand, it will be a match similar to the one against Belarus. They will close up and the solution is to continue being ourselves, that philosophy which has given us a lot of success and we have to keep that idea in mind," he told reporters at a press conference.
"Afterwards there will be variables of more or less attack, but we have to keep the same idea."
Monreal started Friday's clash at left-back, but is expected to drop out of the team this week.