PSV Eindhoven defender Alex threw Arsenal a Champions League lifeline with an own goal - then sent them crashing out with a superb late header.
Arsenal needed to score twice to reach the last eight, and looked on course when Alex diverted Denilson's corner into his own net after 58 minutes.
Arsene Wenger's side then paid the ultimate price for missing chances.
Alex, on loan from Chelsea, headed in Edison Mendez's free-kick with eight minutes left for the vital away goal.
It meant Arsenal's season had gone into meltdown in the space of 10 days, after losing the Carling Cup final to Chelsea and being dumped out of the FA Cup at Blackburn.
Adebayor missed 3 very good chances leaving Arsenal fans very frustrated with the Togolese international.
Arsenal needed to score twice to reach the last eight, and looked on course when Alex diverted Denilson's corner into his own net after 58 minutes.
Arsene Wenger's side then paid the ultimate price for missing chances.
Alex, on loan from Chelsea, headed in Edison Mendez's free-kick with eight minutes left for the vital away goal.
It meant Arsenal's season had gone into meltdown in the space of 10 days, after losing the Carling Cup final to Chelsea and being dumped out of the FA Cup at Blackburn.
Adebayor missed 3 very good chances leaving Arsenal fans very frustrated with the Togolese international.