Holders Barcelona came through a tricky tie at Racing Santander to reach the quarter-finals of the Copa del Rey.

Real Madrid were knocked out by second division Albacete on Wednesday night in Alvaro Arbeloa's first game in charge since replacing Xabi Alonso as manager.

And La Liga leaders Barca also found the going tough against second-tier opponents until Ferran Torres ran through to score in the second half.

Lamine Yamal then wrapped up the win in stoppage time when he converted a cross from Raphinha at the far post.

Barca had dominated possession without finding a way through until substitute Fermin Lopez played a wonderful pass through the Santander backline and Torres, captain for the evening, rounded goalkeeper Jokin Ezkieta to slot in.

Santander are top of the second division in Spain and hoping to return to La Liga next season for the first time since 2012.

Hansi Flick's Barca won last season's cup final in style against rivals Real and will learn of their opponents in the last eight on Monday.