Dortmund topped their group last season before being knocked out in the Round of 16 by eventual runners-up Tottenham.
Barca, meanwhile, were in fine form in Europe’s elite competition but were then stunned by Liverpool in the semi-finals.
Both will be looking for better this term but have been drawn in a difficult group alongside Inter Milan and Slavia Prague.
talkSPORT 2 will bring you full coverage of the action in North Rhine-Westphalia as the two former Champions League winners go head-to-head.
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