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Seeding: Winners, Group D
Marco Reus and Robert Lewandowski scored six of Dortmund's 11 group-stage goals. Without them, the Bundesliga champions lack a cutting edge. Don't get me wrong, Jurgen Klopp's team is full of exceptional individuals—but there's no denying Dortmund aren't the same without their attacking stars.
As we head into the January transfer window, Lewandowksi is once again being touted for a move to the Premier League (via The Daily Mail). Right now, I still believe this is unlikely to materialise. Having recently moved to Dortmund, Reus is at the Westfalenstadion for the foreseeable future.
If either receive an injury, Dortmund's chances of Champions League glory plummet. The more optimistic amongst you will outline Julian Schieber's winning goal against Manchester City as a remedy to the hypothetical problem. I'd suggest Dortmund would need more to land Europe's top prize.
As expected, it's difficult to criticise a team that has escaped the "group of death" without tasting defeat.