Goals from Yaya Sanogo and Alexis Sanchez ensured Arsenal a spot into the last 16 of Europe's elite league.
Leo Messi is now the all-time top scorer in Uefa Champions League history with 74 goals.
The Premier League champions are without a win in this season’s edition of Europe’s elite competition.
Manchester City suffered a 2-1 loss to CSKA Moscow which diminished their hopes of qualifying for the last 16.
Karim Benzema secured a 1-0 win for Real Madrid against a toothless Liverpool.
Real Madrid showed their superiority in their first-ever win over Liverpool in the Uefa Champions League.