The U19 Spanish Youth Cup quarterfinals delivered drama, comebacks, and heartbreak. Real Betis edged past Las Palmas in a penalty shootout after a 2-2 thriller, while Deportivo La Coruña cruised past Tenerife with an 8-1 aggregate. Real Madrid overcame Athletic Bilbao 4-2, and Valencia stunned Barcelona in a penalty shootout after a 3-3 comeback. As a data analyst with over a decade in sports statistics, I break down the key moments, tactical trends, and what to expect in the semifinals.