Real Madrid wing-back Lucas Vazquez admits they failed to meet standards for yesterday's 4-1 humbling by Valencia.
Valencia won through three Carlos Soler penalties and an own goal.
Vazquez said, "As a team, we came into the game on the back of several pretty good performances, in which we performed to our best and tonight's was a tough game. We just weren't at it, we'll have to analyse it, learn from it and improve.
"We've been using the same system of rotations for the last five years with the coach, he does what's in the team's best interests and we try to be in the best possible shape to perform well."
He added: “It'll be a really interesting, open and hard-fought La Liga season. Let's hope that we can ultimately take the title."