Celtic endured one of the darkest nights in their European history at the Raiffeisen Arena, blowing a comfortable four-goal aggregate advantage against LASK to lose 5-4 after extra time.
The stunning collapse follows last year's painful Champions League play-off exit on penalties to Kairat Almaty, compounding the Scottish champions' recent continental struggles.
Speaking after the final whistle, manager Martin O'Neill admitted the defeat was majorly disappointing and openly accepted full responsibility for the team's disastrous second-half implosion.
The missed qualification deprives Celtic of vital Champions League revenue and prestige, which could significantly impact the remainder of their transfer window plans.
Captain Callum McGregor delivered a scathing assessment of the performance, telling supporters the team got what they deserved and refusing to look for excuses.
