Arsenal fell to a disappointing defeat in their opening Champions League Group D clash away to Borussia Dortmund last night.
The Gunners were sluggish throughout, as the Germans netted either side of half time in a 2-0 win.
Ciro Immobile opened the scoring for the hosts just before half time.
And they doubled their lead when Pierre-Emerick Aubameyang finished early in the second half.
The hosts dominated the game and probably should have won by more.
Arsenal also had their chances to score, with new signing Danny Welbeck guilty of wasting their best chance.
