Teenage striker Endrick scored the only goal as a second-string Real Madrid side did enough to claim a nervy 1-0 win at Real Sociedad in the first leg of their Copa del Rey semi-final on Wednesday.

Real Madrid started brightly, despite coach Carlo Ancelotti resting several key players, and it took them 19 minutes to break the deadlock, with 18-year-old Brazilian Endrick finishing neatly off a counter-attack.

Vinícius Júnior worked hard in defence to regain possession and quickly played the ball back to Jude Bellingham, who played a brilliant long pass which Endrick collected before curling a left-footed shot past the goalkeeper.

Álex Remiro made a fine one-handed save to deny Vinícius from close range on 25 minutes, while Sociedad captain Mikel Oyarzabal wasted a golden opportunity to equalise soon after, unleashing a low shot from inside the area that was easily saved by Andriy Lunin.

Madrid came out strongly after the break and dominated proceedings, but were repeatedly denied by a Real Sociedad side who also created chances, with both goalkeepers producing inspiring performances to thwart their rivals' efforts.

The best chance came from Endrick, who almost doubled Real's lead when he unleashed a fierce drive from the edge of the area that struck the crossbar, while Remiro later produced another fine save to deny Bellingham.

Real Madrid will have home advantage for the return leg on 1 April, while Atletico Madrid will host Barcelona in the other semi-final a day later, having played out a 4-4 draw in the first leg on Tuesday.