In their last two games the Andalusians beat Everton and Mainz 1-0 and 5-0 respectively, leaving the coach satisfied.
"I'm happy about the performances and about keeping a clean sheet in two demanding games," he said.
Particularly pleased with the win over the Premier League side, Lopetegui couldn't hide his happiness.
"It was a top-level opponent with international players all over the pitch," he said.
"They've come here more complete than us.
"I insisted on keeping a clean sheet and we have to learn that that will be our basic aim for the season."