Copa Del Rey Round-Up
By Rob Lancaster
Last Updated: 01/01/70 1:00am
David Villa Sanchez (pictured) struck the only goal from the penalty spot in the first leg at Camp Nou to give the struggling Primera Liga outfit a surprise victory.
Barca will now have to win away by two clear goals in the second leg if they are to progress through to the final four of the competition.
A hat-trick from Ruben Navarro helped Alaves grab a 4-2 lead after the first leg of their clash with Celta Vigo.
The Segunda Liga side made full use of home advantage despite falling behind early on to a header from Mauricio Pinilla.
Navarro levelled matters on 21 minutes and added a spectacular second seven minutes before the break.
Pinilla grabbed his second of the game to make it 2-2 soon after the interval but Navarro completed his treble on 51 to put his side back in front.
Magno volleyed in a third on 53 to give Alaves a real chance of an upset going into the second leg.