Athletic Bilbao coach Ernesto Valverde was left frustrated after their 0-0 draw with Getafe.
The result is a blow to their European hopes.
"A draw is not enough for us. We went for the game, but we couldn't turn our dominance into goals," Valverde said after the game. "We tried in every way we could and the draw almost feel worse because of that."
Athletic are back in action at San Mames on Tuesday night, when they face CA Osasuna in the second leg of their Copa semi-final, a tie in which they are currently 1-0 down on aggregate.
Valverde said: "It's a different game. It's winner takes all. Each team has its strengths and weaknesses and we will have make sure we leave everything on the pitch to make it to the final."