Athletic Bilbao have taken charge of their Copa del Rey semi-final after claiming a 1-0 win over Granada at San Mames, but they will be frustrated at failing to secure a more commanding victory.
Gaizka Garitano's men were in control for most of the game, crafting several big chances and having two goals disallowed, but only take a slender victory to Granada for the second leg.
It came as little surprise when Athletic went in front in the 42nd minute, as Iker Muniain tapped home after fine work from Inaki Williams on the left flank.