Thierry Correia says Valencia's players were happy with their friendly defeat to Levante.
The Portuguese fullback says the team is responding well to new coach Jose Bordalas.
"We wanted to leave here without conceding goals. We managed that, and we are very happy with the win. But there are still many things to improve," he told the club's website.
"We weren't up to standard against Real Zaragoza. Today we performed at a better level. What we've worked on and trained throughout the week help the games to go better."
Next Wednesday's exhibition contest against AC Milan will be a good test.
"The Trofeo Naranja will be a special game, with the fans at Mestalla. We're going to work hard. I'm working hard, because I want to help the team."