Neymar’s 22nd minute penalty was enough to help Luis Enrique’s men end a eight match winless run at the Basque venue, their last victory coming in 2007.
Barcelona are seeking their third successive Copa del Rey under Luis Enrique.
Atletico Have One Leg In The Semis
The Colchoneros have an almost unassailable lead going into the second leg. Antoine Griezmann, Angel Correa and Kevin Gameiro were all on target as Diego Simeone’s ward ran riot to win their fourth in five matches.
Angel Correa scored Atletico’s 500th goal under Simeone.
Eibar have an uphill task going into the second leg.
Real Lose Second on The Trot
Celta Vigo made it back-to-back defeats for Real Madrid as they stunned the Santiago Bernabeu with a 2-1 victory in the first leg of the Copa del Rey quarter-final.
Real were looking to bounce back from a late and dramatic loss to Sevilla but played a goalless first half. The breakthrough fell to Celta through former Liverpool player Iago Aspas and two goals from Marcelo and Jonny Castro followed in quick succession in a six minute goal flurry.
Real have a tough task going into the second leg and Zidane’s wards need to turn their downhill form around before they visit the Balaidos in a week’s time.
Alcoron Loses at Home
Alavez overcame Alcoron at the Santi Domingo. In a game with five yellow cards and one red card, Alavez came out on top. Spanish player Ibai scored a brace that sealed the affair.