Arsenal kickstarted their Champions League hopes with a key 2-0 victory over German giants Bayern Munich at Emirates Stadium.
The Gunners' hopes of reaching the knockout phase were in danger after they lost their opening two games away to Dinamo Zagreb and at home to Olympiakos.
Arsene Wenger's side responded by beating Pep Guardiola's Bayern, who are clear favourites to win Group F.
Bayern dominated possession but Arsenal dug out the win that keeps their hopes alive when substitute Olivier Giroud scored from close range in the 77th minute after goalkeeper Manuel Neuer made a mistake.
The win was sealed in the last few seconds when Mesut Ozil turned in Hector Bellerin's cross.