Zinedine Zidane suffered his first setback as Real Madrid boss as Los Blancos were held 1-1 at Real Betis on Sunday to slip four points behind La Liga leaders Barcelona.
Atletico Madrid also spurned the chance to move back on top as they failed to break down 10-man Sevilla in a 0-0 draw at the Vicente Calderon.
A point means Atletico and Barcelona are now level on points at the top of the table ahead of their meeting at the Camp Nou next weekend, although Barca also have a game in hand on both sides from the capital.
“All we missed was starting the game well. We knew it was going to be difficult from the first minute and it was hard at the start, but then with the game we played we deserved a lot more,” said Zidane.
“That is football. When you have chances you have to take them and we lacked a bit of luck too.”
Betis hadn’t scored in their previous seven games as part of a 10-game winless streak, but needed just seven minutes to make the breakthrough in spectacular fashion.