Arsenal exited the Champions League on Tuesday despite beating Monaco 2-0 in their Champions League last-16, second-leg clash in Monaco but losing on the away goals rule after the tie finished 3-3 on aggregate.
A first-half goal by Olivier Giroud and then Aaron Ramsey 11 minutes from time gave the Gunners hope but desperate defending by Monaco saw them hold on to reach the quarter-finals.
Monaco emulated fellow Ligue 1 side Paris Saint-Germain in eliminating a Premier League giant from this season's competition as PSG knocked out Chelsea also on away goals last week.
"The best team went through," said Arsenal's captain Per Mertesacker.
"Monaco deserved it because they played much better in the first leg.