Dortmund now have a slim chance of qualifying and would be hoping that Barcelona do not let off against Inter Milan as the Catalans are already through to the next round.
Compared to Inter, Dortmund has a much better chance at going through to the round of 16. Inter milan is facing Barcelona in the final round of group stage matches. What makes you think they would win Barcelona? And evenif they draw, there's only a slim chance that Dortmund won't win Slavia Prague?
Barcelona, Dortmud and Inter Milan need points to advance to the next round. If Inter can beat Barcelona then it will qualify for Inter with Dortmund, because I'm sure Dortmun vs Slavia Prague will definitely win Dortmund 80%.
But the match that will be tense is Barcelona vs Inter Milan.