Villarreal coach Unai Emery was disappointed with his players after defeat to Cadiz.
Ruben Sobrino swooped for the winner on 90 minutes.
Emery once more underlined the importance of the league to return to playing in Europe next season.
He said, “The principle objectives are earned in LaLiga. The Champions League is giving us a lot of joy, but we're paying for it.
"Being capable of finding consistency is the hardest challenge. We need to be capable of being strong. Being in the Champions League quarter finals gives us recognition, but LaLiga is where we need to focus on.
"We know that because we're always speaking about it."
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