Madrid: A second-string Barcelona set up a King`s Cup quarter-final clash against holders and great rivals Real Madrid when they came back from a goal down to beat Osasuna 2-1 for a 6-1 aggregate victory.
Serbian forward Dejan Lekic put the home side ahead just before halftime at a foggy Reyno de Navarra stadium but any hopes of an unlikely comeback were snuffed out by Barca`s Chile international Alexis Sanchez when he nodded the equaliser four minutes into the second half.
Teenage B-team midfielder Sergi Roberto grabbed the winner 18 minutes from time when he ran on to a pass from substitute Lionel Messi and crashed a superb angled shot past goalkeeper Asier Riesgo.
Barca, who lost 1-0 to Real in last year`s final, travel to the Spanish capital for the first leg on Wednesday, with the return leg at the Nou Camp a week later.
The winners of the tie will meet city rivals Valencia or Levante in the semi-finals.
On the other side of the draw, Athletic Bilbao hammered third-tier Albacete 4-0 at the San Mames to secure a last-eight tie against La Liga rivals Real Mallorca, who overturned a 2-0 first-leg deficit by thrashing Real Sociedad 6-1 on Tuesday.
The winners will meet either 2006 winners Espanyol or third-tier Mirandes, who disposed of Racing Santander on Tuesday, in the last four.