Real Madrid have become complacent while watching Barcelona "reinvent themselves", according to former midfielder Victor Sanchez.
La Liga leaders Barca were held to a surprise 0-0 draw by Getafe on Sunday, but still hold a 17-point lead over the champions, who sit fourth.
Madrid also suffered a shock Copa del Rey exit at the hands of Leganes and must beat Paris Saint-Germain in the last 16 of the Champions League if they are to keep alive their hopes of a third successive triumph in Europe.
Victor, who progressed through Madrid's youth ranks and won La Liga and the Champions League with the senior team, believes his old club have paid the price for resting on their laurels this term.