Pablo Fornals' kicked 'Los Blancos' whilst they were down on Saturday, scoring a delicate late chip to condemn the Spanish giants to defeat in a game that Zinedine Zidane's side really ought to have had signed, sealed and delivered by half-time.
Left-back Marcelo was one of several disppointing performers, failing with 13 of his 16 crosses in the game, his worst record in a La Liga match.
13 January 2018
"It is one of the worst situations I've experienced here," the Brazilian admitted after the game, some statement when you consider that he has been at Real for 11 years.
"We're trying to play good football, to move the ball around and score goals but it's not coming off."
The game saw Real have 28 shots on goal, the most of any side in a single La Liga game this campaign, but still they failed to find the net, something Zidane was at a loss to explain after the game.
13 January 2018
"It is how it looks from the outside - we are sad, angry and we feel like we are sinking," Marcelo added.
The loss saw Real fall 16 points behind leaders Barcelona, who could extend that lead when they face Real Sociedad on Sunday.