Real Madrid were knocked out of the Copa del Rey by one of their own as Real Sociedad secured a dramatic 4-3 victory in the quarter-final on Thursday.
Martin Odegaard, who is on loan from Real Madrid but was allowed to face his club, got the opening goal before Alexander Isak scored twice to give Sociedad a 3-0 lead.
Marcelo and Rodrygo then scored in the second half. Mikel Merino scored a fourth for the visitors before Nacho Fernandez's header ensured a riveting final three minutes.
With Andoni Gorosabel sent off, ten-man Real Sociedad held on for a nail-biting win to progress to the last four while Real Madrid's run without success in Spain's domestic cup stretched to six years.
"It hurts, we have to be honest, nobody likes a defeat," said Real Madrid manager Zinedine Zidane.
Madrid ended up conceding as many goals in 69 minutes as they had in their last 11 games. But the one positive for them was the performance of Odegaard, who showed why he was signed by Madrid at the age of 15.
Odegaard is supposed to be at Sociedad for one more year but after his superb effort, during which he also received a standing ovation from the home crowd, Madrid might well decide to to recall him early.
Sociedad, on their part, showed why they were pushing for top four in the La Liga earlier this season before their dip in form.
"It is the second time in 32 years we've reached the semis," said manager Imanol Alguacil. "We were convinced we could do it. But we haven't achieved anything yet."
"Our fans deserved a prize like this,” he added. ”This victory means a lot, coming at a packed Bernabeu, against a team like Real Madrid, with our team playing well. You can imagine how we are feeling right now.”
