The Barcelona star completed his own personal misery by throwing himself into a challenge and tangling legs with the opposition player.
Barcelona could not fight their way back into the contest from 1-0 down and ended up conceding again, as they slipped up in their pursuit of Real Madrid.
Los Blancos are now three points clear of their fierce rivals and have one game in hand. Neymar will be out of his side's next clash, a game at the Nou Camp against Real Sociedad.