Real Sociedad won the first leg of the King's Cup semifinal after defeating Athletic Bilbao 1-0 at the San Mames Stadium, Bilbao, Wednesday local time.
Sociedad's only goal was scored by Benat Turrientes in the 62nd minute, according to Copa del Rey records.
In the second leg next March, Sociedad only need a draw at home to qualify for the final.
In the first half, Sociedad made several threats through Goncalo Guedes and Jon Martin.
