Knowing a defeat would have provided a huge blow to their hopes of reaching the next phase, Arsenal were under pressure to perform.
Repeating that result in the return game in Germany in 2 weeks would boost their chances of going through to the last 16.
But Manager Arsene Wenger says they have domestic matches to focus on first.
Meanwhile, Chelsea are third in their Champions League group at the halfway stage of this phase of the tournament.
They're drew 0-0 in Ukraine last night against Dynamo (pron: DIE-NA-MOE) Kiev.
The Londoners have claimed 4 points from their opening 3 games.
To action on the pitch tonight, Manchester United could go top of their Champions League group…they're away to CSKA Moscow.
Meanwhile, Manchester City would improve their hopes of making the last-16 by beating Sevilla.
