After the 1-1 draw in San Sebastian last Thursday, they were in action again at the Reale Arena on Sunday night, taking on Sevilla in La Liga.
Coach Imanol Alguacil heavily rotated his side, to keep his players fresh for Thursday's 20:00 kick-off in M16.
Sevilla's Chidera Ejuke scored the only goal of the game, early in the second half, to send them above Real Sociedad in the table, into 10th spot.
Alguacil made a startling eight changes to the XI on duty last week, with only Nayef Aguerd, Igor Zubeldia and Benat Turrientes retaining their place in the side.