With Valencia only drawing 1-1 at home to bottom club Zaragoza in the early match, the Primera Division already seems to be turning into a two-horse race, but Guardiola believes all of the teams in the league represent a difficult test for his side.
"All I can say is that it is hard to go to Zaragoza, to go to Sevilla, to go to Hercules, to Valencia. They are good teams that are hard to beat and you have to be at your best to beat them," he said.
"We have lost five points at home this season, so that shows how difficult it can be."
Sevilla have been one of the top sides in Spain in recent seasons, but the Andalusians offered little resistance tonight.
"We played a complete match and I am very happy with the players," Guardiola said.
"But the early goal helped us," he admitted.