What's behind Arsenal's 3-2 loss to Borussia Dortmund?
Borussia Dortmund beat Arsenal 3-2 at the Emirates, exposing defensive problems before the Community Shield while Tzolis and Nwaneri provided positives.

Borussia Dortmund beat Arsenal 3-2 at the Emirates, exposing defensive problems before the Community Shield while Tzolis and Nwaneri provided positives.