Oscar Trejo scored the winner with a contentious second-half penalty as Real Madrid missed the chance to return to the LaLiga summit after falling to a 3-2 defeat at Rayo Vallecano.
Carlo Ancelotti s side trail leaders Barcelona by two points after losing at Vallecas, where referee Juan Martinez Munuera and the VAR played a significant part on Monday.
Luka Modric s penalty and an Eder Militao header had put Madrid into the lead after Santiago Comesana s opener, before Alvaro Garcia equalised during a breathless first half.
Yet there was to be more drama when Dani Carvajal was deemed to have encroached as Thibaut Courtois saved a 67th-minute penalty from Trejo, who converted the retake to secure victory.
2 have kept only two clean sheets in their 13 games…