San Mames was the setting as Ousmane Dembele made his return from injury for Barcelona, 20 days after suffering a sprained ankle.
The French forward came on for Philippe Coutinho for the last 15 minutes of the 0-0 draw at Athletic Bilbao on Sunday.
Dembele sustained the problem against Leganes in a 3-1 win at Camp Nou. Initially it was thought he would miss two weeks, but it ended up being three.
The French international missed a total of five games. Two against Girona and Valencia in La Liga, both matches against Sevilla in the Copa QFs and then the semi first leg against Real Madrid.
Dembele had been in sweet form before his injury, starring against Levante as Barca came from behind in the Spanish Cup.