Faltering La Liga champions Real Madrid slid to a shock 2-1 defeat at home to Alaves on Saturday as goalkeeper Thibaut Courtois made a catastrophic error and record signing Eden Hazard suffered yet another injury.
Lucas Perez gave Alaves the lead in the fifth minute from the penalty spot after a handball from Nacho, the fifth penalty that Madrid have conceded in the league in three matches.
Hazard wasted a chance to equalise when he fired straight at Alaves keeper Fernando Pacheco and then had a penalty appeal waved away before hobbling off with a muscle injury in the 28th minute.
Former Madrid youth player Joselu made the most of a gift from Courtois to double Alaves's lead early in the second half, unexpectedly receiving a stray pass from the Belgian outside the area and slotting into the empty net.
Casemiro pulled back a goal for Madrid in the 86th minute from close range while Isco almost found an equaliser in the sixth minute of added time but his shot bounced off the crossbar and Madrid had to swallow a third defeat in 10 league games.
Zinedine Zidane's side are fourth in the standings on 17 points after 10 games, six below leaders Real Sociedad and second-placed Atletico Madrid. Alaves climbed up to ninth on 13