They were equally likely to face either Wolfsburg or Zenit St Petersburg , ties in which they would have been favourites rather than underdogs .
Arsenal had a one - in - five chance of facing Barcelona in the round of 16 but there were other possibilities .
Arsenal were equally likely to face either Wolfsburg or Zenit St Petersburg , ties in which Arsenal would have been favourites rather than underdogs .
Arsenal had a one - in - five chance of facing Barcelona in the round of 16 but there were other possibilities .