Robert Lewandowski's late winner condemned Arsenal to their first defeat in the Champions League this season on Tuesday.
Henrikh Mkhitaryan put the German side ahead on 16 minutes before Olivier slammed home an equaliser four minutes before half-time.
But the Polish forward finished off a flowing Dortmund move with eight minutes remaining to leave Group F wide open with both teams, as well as Napoli, level on six points.
You can watch a bitesize cut of the game by clicking the play button above.Copyright 2015 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 23 Oct 2013