Real Sociedad coach Imanol Alguacil was left satisfied with their 1-0 win at Malaga.
Imanol admits the narrow scoreline, however, did have him concerned.
He said: "You always suffer when the difference on the scoreboard is minimal but I think that, if anyone deserved to win, it was us.
"It's a shame that once again we have reached the final minutes with the score at 0-1, when the score should have been more than resolved, because in the first half we were well ahead of Málaga, but without success.
"The season is going very, very good and we want to continue in this second round, knowing that it is difficult in all areas.
"You have already seen that all of the Primeras have passed, but with very tight margins."