Pep Guardiola admitted Manchester City were "really, really poor" as they slumped to their first home defeat in 15 months at the hands of Basel.
The runaway Premier League leaders were beaten 2-1 by the Swiss side after making six changes for the second leg of their Champions League last-16 tie on Wednesday.
MATCH REPORT: Defeat but not despair for Guardiola as first-leg rout sees City through
The loss was not enough to prevent City progressing to the quarter-finals 5-2 on aggregate but Guardiola was nevertheless frustrated by the drop in intensity.