Dortmund is considered as weaker than Chelsea. They don't have a strong striker like Haaland and it is a disadvantage for them. Chelsea have better players than Dortmund and they will be a favorite team for gamblers. Anyway, in football, surprise is the most interesting thing and we can wait for surprise from Dortmund. It is supported by unstable performance of Chelsea in this season.
These are exactly what i said. But i for one isn't expecting any upset from Dortmund in this game, i think it is going to be a pretty straightforward victory for Chelsea, though i am not expecting the blues to go farther than the QF, or at best, the SF, except if they come back really strong after the world cup and prolly make a couple of good signings in the winter transfer window to lift the team, because right now they are pretty very low in confidence.