Determined Raphael Guerreiro has warned Rangers that Borussia Dortmund are gunning for Europa League glory but admits his team can't defend.
But the Portuguese international left-back agrees with club captain Marco Reus that they have major problems at the back due to their ropey rearguard.
Rangers head to Germany next week for the first leg of the play-off round, with Dortmund facing heavy criticism in their homeland after a poor season.
