Lucas Perez's 87th-minute penalty sealed a 2-1 comeback victory for Deportivo La Coruna against Eibar at the Estadio Riazor on Friday night.
Eibar took the lead 10 minutes into the second half with an Ivan Ramis header from a corner but the Galicians drew level with a volley on the stretch from Pedro Mosquera.
A point would perhaps have been the right result but Perez earned Depor all three in their opening La Liga game when he won a late spot kick and converted it himself.
The visitors looked well organised in a first half which lacked any clear-cut opportunities for either side.
Eibar goalkeeper Asier Riesgo got down well to keep out a cleanly-struck 25-yard effort from on-loan Udinese midfielder Guilherme after 51 minutes.
Former Manchester United misfit Bebe's swerving shot was pushed wide by Argentinian goalkeeper German Lux. Bebe took the resulting 55th-minute corner and Ramis rose highest and glanced a header past Lux at the near post, which the Argentinian should really have saved.
Riesgo comfortably dealt with a free-kick from Depor's Faycal Fajr, but the Eibar lead evaporated with just over 20 minutes to go.
Raul Albentosa floated a left-footed free kick into the box from the right and Mosquera beat the offside trap and stretched to volley back across Riesgo's goal and inside the far post.
Ramis tried to restore the lead he had given to Eibar with six minutes left, but this time his near-post header from a corner was easily gathered by Lux.
The decisive moment came when Fajr sent in a high ball from the left and David Junca was adjudged to have pushed Perez in the back as they jostled to get on the end of it. The Depor forward, who scored 17 goals in La Liga last season, made no mistake from the spot to seal the three points.
Former Arsenal midfielder Fran Merida secured a point for promoted Osasuna in a 1-1 draw against Malaga at La Rosaleda.
Playmaker Juanpi gave Juande Ramos' Malaga the lead with a neat 56th-minute goal but substitute Merida, who moved to Pamplona from Huesca this summer, levelled the scores with five minutes to go of their La Liga opener.
The first 45 minutes of the Spanish top-flight season were a slow-burner to say the least, with neither side creating an opening until the 38th minute.
The second half got off to an equally low-key start before Malaga moved ahead with a well-worked goal 10 minutes in.
Jaime Romero played a neat one-two with Miguel de las Cuevas and sent a low cross in from the right. Diego Llorente was unable to clear and Merida, despite losing his balance, was able to steer a close-range shot past Carlos Kameni.
Malaga had one final chance as the ball ricocheted kindly to substitute Chory Castro but no one was able to get a decisive touch to his cross.