Santiago Solari accepted Real Madrid were "weak" in their loss to Leganes, despite progressing to the quarter-finals of the Copa del Rey.
Madrid's 3-0 first-leg win meant Wednesday's 1-0 defeat at Butarque was not enough to send them out of the tournament at the expense of Leganes for the second year in a row.
Solari gave Isco a start in a rejigged team that saw Marcelo feature on the wing in the first half, with Madrid struggling to create chances without a focal point in attack.
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And Solari accepted his side, who have lost two of their last four matches, were not good enough against Leganes, who won the second leg thanks to a first-half Martin Braithwaite goal.