David Trezeguet added to Hercules's giant-killing reputation in La Liga by scoring both goals in a 2-0 victory at home to Sevilla.
Two weeks ago, Nelson Valdez was the hero as he led the promoted club to a stunning 2-0 win over champions Barcelona, but that had been their only victory in four outings since winning promotion.
Sevilla fans chanted for coach Antonio Alvarez to resign after their midweek draw at home to Racing Santander and this performance will have done little to ease the pressure on him, despite it being their first league defeat of the season.
They dropped to sixth with eight points from five games, five short of leaders Valencia, who won 2-0 at Sporting Gijon on Saturday.
Sevilla were rocked back after 21 minutes when Didier Zokora needlessly tripped Tiago Gomes in the area, and former France striker Trezeguet netted from the penalty spot.
It went from bad to worse for the visitors when good work down the left from Real Madrid loanee Royston Drenthe led to Trezeguet nudging in Kiko Femenia's volley just before the break.
Barca are second with 12 points after a 3-1 win at Athletic Bilbao yesterday, when Real Madrid slipped to third with 11, after a 0-0 draw away to promoted Levante.
Kalu Uche eased the pressure on Almeria coach Juan Manuel Lillo with two first-half headers as his side overcame Deportivo Coruna 2-0 away for their first win of the campaign.
The Nigerian forward sprinted to the touchline to celebrate with Lillo, who was in the spotlight after club president Alfonso Garcia Gabarron had said they would review the coach's position after the trip to the Riazor.
Argentine striker Fernando Cavenaghi scored both goals in Real Mallorca's 2-0 victory at home to promoted Real Sociedad, while Espanyol and Getafe both won 1-0 against Osasuna and Racing respectively.
