(CNN) -- Big-spending Real Madrid have crashed out of the Spanish Cup in the second round for the second year in a row after failing to overturn a 4-0 deficit against third-tier club Alcorcon.
Madrid, who spent massive amounts on new players in pre-season, were booed off by their own fans after managing a 1-0 win at home in the second leg of the Copa Del Rey tie.
The Real supporters, who have come to expect big things following president Florentino Perez's huge summer outlay, were less than impressed that the team took until the 81st minute to score.
But midfielder Rafael Van Der Vaart's goal will not be enough to relieve the pressure mounting on coach Manuel Pellegrini, who was jeered when he substituted midfielder Lassana Diarra in the second half.
The Chilean had included former World Player of the Year Kaka and Real legend Raul in an attacking lineup.
Real's veteran striker Ruud van Nistelrooy hit the crossbar after the interval and Argentina international Gonzalo Higuain also struck the woodwork, but Alcorcon also missed two late chances that could have piled on the misery for Pellegrini.
La Liga rivals Valencia scraped into the next round after being held 2-2 at home by lower league side Alcoyano, progressing 3-2 on aggregate.
Carlos Marchena and Nikola Zigic put Valencia 2-0 ahead but Victor Curto pulled one back before the home side had defender Alexis sent off, then Carpio leveled the scores on the night.
Villarreal also squeaked through against Puertollano, with Giuseppe Rossi scoring the only goal 14 minutes from time for a 2-1 aggregate success.
Atletico Madrid crushed Marbella 6-0 to go through 8-0 on aggregate as Maxi Rodriguez scored four goals, while Sevilla thrashed Ciudad de Lorqui 5-1 for a 9-3 overall victory with all the Andalucians' goals coming in the second half.
Top-flight teams Tenerife and Real Zaragoza tumbled out at the hands of Celta Vigo and Malaga respectively.
Deportivo La Coruna went through 1-0 on aggregate after a goalless draw against Murcia, while Osasuna sent Primera Liga strugglers Xerez out 3-1 on aggregate.
Defending champions Barcelona were at home to Cultural Leonesa in the late match, holding a 2-0 lead from the first leg.